HMH Go Math

Go Math Answer Key for Grade 1 aids teachers to differentiate instruction, building, and reinforcing foundational mathematics skills that alter from the classroom to real life. With the help of Go Math primary school Grade 1 Answer Key, you can think deeply regarding what you are learning, and you will really learn math easily just like that.

Go Math Grade 1 Chapter 6 Answer Key Count and Model Numbers

To  achieve high scores in Grade 1, students need to solve all questions and exercises included in Go Math book considers both the content and problems. Students of Grade 1 can get a strong foundation on mathematics concepts by referring to the Go Math course Book. It was highly professional mathematics educators and the solutions prepared by them are in a concise manner for easy grasping.

Count and Model Numbers Show What You Know

Explore Numbers 6 to 9
Count how many. Circle the number.
Question 1.

Answer:
The number of pears = 7.

Explanation:
In the above-given question,
given that,
there are 7 pears.
so, the number of pears = 7.

Question 2.

Answer:

The number of strawberries = 8.

Explanation:
In the above-given question,
given that,
there are 8 strawberries.
so, the number of strawberries = 8.

Count Groups to 20
Circle groups of 10. Write how many.
Question 3.

__15_____

Answer:
The number of teddybears = 15.

Explanation:
In the above-given question,
given that,
there are 15 teddybears.
so, the number of teddybears = 15.

Question 4.

__20_____

Answer:

The number of teddybears = 20.

Explanation:
In the above-given question,
given that,
there are 20 teddybears.
so, the number of teddybears = 20.

Make Groups of 10
Use ◯. Draw to show a group of 10 in two different ways.
Question 5.

Answer:
The number of objects = 10.

Explanation:
In the above-given question,
given that,
there are 10 objects.
so, the number of objects = 10.

Question 6.

Answer:
The number of objects = 10.

Explanation:
In the above-given question,
given that,
there are 10 objects.
so, the number of objects = 10.

Count and Model Numbers Vocabulary Builder

Visualize It
Draw pictures in the box to show the number.

Answer:
The number of objects = 2.

Explanation:
In the above-given question,
given that,
there are 2 objects.
so, the number of objects = 2.

Answer:
The number of objects = 9.

Explanation:
In the above-given question,
given that,
there are 9 objects.
so, the number of objects = 9.

Answer:
The number of objects = 5.

Explanation:
In the above-given question,
given that,
there are 5 object.
so, the number of objects = 5.

Understand Vocabulary
Write a review word to name the number.
Question 1.
____10____

Answer:
The number of pink crayons = 10.

Explanation:
In the above-given question,
given that,
there are 10 pink crayons.
so, the number of pink crayons = 10.

Question 2.
___4____

Answer:
The number of yellow crayons = 4.

Explanation:
In the above-given question,
given that,
there are 4 yellow crayons.
so, the number of yellow crayons = 4.

Question 3.
___6______

Answer:
The number of blue crayons = 6.

Explanation:
In the above-given question,
given that,
there are 6 blue crayons.
so, the number of blue crayons = 6.

Count and Model Numbers Game Show the Numbers

Materials

Play with a partner.

1. Put your on START.
2. Spin the Move you that many spaces.
3. Read the number. Use to show the number on a ten frame.
4. Have your partner count the to check your answer. If you are not correct, lose a turn.
5. The first player to get to END wins
6. 

Count and Model Numbers Vocabulary Game

Going to Town

For 2 players
Materials


• clue cards
How to Play

1. Put your on START.
2. Toss the to take a turn. Move that many spaces.
3. If you land on one of these spaces:
   Red Space Take a Clue Card. Answer the question. If you are correct, move ahead 1. Return the Clue Card to the bottom of the pile.
   Blue Space Read the word. Tell what it means, or give an example. If you are correct, move ahead 1.
   Green Space Follow the directions in the space.
4. The first player to reach FINISH wins.

DIRECTIONS 2 players. Take turns to play. • To take a turn, toss the . Move that many spaces • Follow the directions for the space where you land. • First player to reach FINISH wins.
MATERIALS • 1 per player • • 1 set of clue cards

Answer:
The word is a sum.

Explanation:
In the above-given question,
given that,
1st player through the dice.
2 + 3 = 5.
The word is the sum.

Answer:
The word is a difference.

Explanation:
In the above-given question,
given that,
2nd player through the dice.
3 – 2 = 1.
The word is the difference.

The Write Way
Reflect
Choose one idea. Draw and write about it.

• Tell how you can use a counting chart to solve problems.
• Explain two ways that you can show a number as tens and ones.

Lesson 6.1 Count by Ones to 120

Essential Question How can knowing a counting pattern help you count to 120?

Listen and Draw

Write the missing numbers.

Answer:
The missing numbers is = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20.

Explanation:
In the above-given question,
given that,
The numbers from 21 to 100.
The missing numbers is = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20.

MATHEMATICAL PRACTICES
Look for Structure Explain how you know which numbers are missing.

Answer:
The missing numbers is = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20.

Explanation:
In the above-given question,
given that,
The numbers from 21 to 100.
The missing numbers is = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20.

Model and Draw

Count forward. Write the numbers.

Answer:
The numbers are 11, 12, 13, and 14.
The numbers are 101, 102, 103, and 104.
The numbers are 111, 112, 113, and 114.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 11, 12, 13, and 14.
The numbers are 101, 102, 103, and 104.
The numbers are 111, 112, 113, and 114.

Share and Show

Use a Counting Chart. Count forward. Write the numbers.

Question 1.
114, 115___, __116__, __117__, _118___, __119__, _200___

Answer:
The numbers are 114, 115, 116, and 117.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 114, 115, 116, and 117.

Question 2.
51, _52__, __53__, __54__, __55__, __56__, __57__

Answer:
The numbers are 51, 52, 53, 54, 55, 56, and 57.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 51, 52, 53, 54, 55, 56, and 57.

Question 3.
94, _95__, __96__, _97___, __98__, __99__, __100__

Answer:
The numbers are 94, 95, 96, 97, 98, 99, and 100.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 94, 95, 96, 97, 98, 99, and 100.

Question 4.
78, _79__, _80___, _81___, __82__, __83__, _84___

Answer:
The numbers are 78, 79, 80, 81, 82, 83, and 84.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 78, 79, 80, 81, 82, 83, and 84.

Question 5.
35, _36__, _37___, _38___, __39__, __40__, _41___

Answer:
The numbers are 35, 36, 37, 38, 39, 40, and 41.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 35, 36, 37, 38, 39, 40, and 41.

Question 6.
104, _105__, _106___, _107___, __108__, _109___, _200___

Answer:
The numbers are 104, 105, 106, 107, 108, 109, and 110.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 104, 105, 106, 107, 108, 109, and 110.

On Your Own

MATHEMATICAL PRACTICE Look for a Pattern Use a Counting Chart. Count forward. Write the numbers.
Question 7.
19, _20__, _21___, __22__, _23___, __24__, __25__, _26___, _27___

Answer:
The numbers are 19, 20, 21, 22, 23, 24, 25, 26, and 27.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 9, 20, 21, 22, 23, 24, 25, 26, and 27.

Question 8.
98, _99__, _100___, _101___, _102___, _103___, _104___, _105___, _106___

Answer:
The numbers are 98, 99, 100, 101, 102, 103, 104, 105, and 106.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 98, 99, 100, 101, 102, 103, 104, 105, and 106.

Question 9.
60, _61__, _62___, _63___, _64___, __65__, __66__, _67___, _68___

Answer:
The numbers are 60, 61, 62, 63, 64, 65, 66, 67, and 68.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 60, 61, 62, 63, 64, 65, 66, 67, and 68.

question 10.

27, _28__, _29___, __30__, __31__, __32__, __33__, _34___, __35__

Answer:
The numbers are 27, 28, 29, 30, 31, 32, 33, 34, and 35.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 27, 28, 29, 30, 31, 32, 33, 34, and 35.

Question 11.
107, _108__, _109___, __110__, _111___, _112___, __113__, __114__, __115__

Answer:
The numbers are 107, 108, 109, 110, 111, 112, 113, 114, and 115.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 107, 108, 109, 110, 111, 112, 113, 114, and 115.

Question 12.
THINK SMARTER
Use a Counting Chart to write the numbers counting forward.

_115__, _116___, _117___, __118__, _119___, 120

Answer:
The numbers are 115, 116, 117, 118, 119.

Explanation:
In the above-given question,
given that,
write the numbers counting forward.
The numbers are 1 to 120.
The numbers are 115, 116, 117, 118, 119.

Question 13.
THINK SMARTER
There is an unknown number in the sequence counting forward. The number is greater than 51. The number is less than 53. What is the unknown number?
__52_______

Answer:
The unknown number is 52.

Explanation:
In the above-given question,
given that,
The number is greater than 51.
The number is less than 53.
The unknown number is 52.

Problem Solving • Applications

Use a Counting Chart. Draw and write numbers to solve.
Question 14.
GO DEEPER
The bag has 99 buttons. Draw more buttons so there are 105 buttons in all. Write the numbers as you count.

Answer:
The numbers are 100, 101, 102, 103, 104, and 105.

Explanation:
In the above-given question,
given that,
The bags have 99 buttons.
Draw more buttons so there are 105 buttons in all.
The numbers are 100, 101, 102, 103, 104, and 105.

Question 15.
THINK SMARTER
The bag has 56 buttons. How many more buttons do you need to add to the bag to have 64 buttons?

____8___ buttons

Answer:
The numbers are 56, 57, 58, 59, 60, 61, 62, 63, and 64.

Explanation:
In the above-given question,
given that,
The bags have 56 buttons.
Draw more buttons so there are 105 buttons in all.
we need to add 8 buttons.
Question 16.
THINK SMARTER
Tito counts 105 cubes. Then he counts forward some more cubes. Write the numbers.

105, _106__, _107___, __108__, _109___, _110___, _111.____

Answer:
The some-more cubes are 106, 107, 108, 109, 110, and 111.

Explanation:
In the above-given question,
given that,
Tito counts 105 cubes.
Then he counts forward some more cubes.
The some-more cubes are 106, 107, 108, 109, 110, and 111.

TAKE HOME ACTIVITY • Take a walk with your child. Count aloud together as you take 120 steps.

Count by Ones to 120 Homework & Practice 6.1

Use a Counting Chart. Count forward. Write the numbers.
Question 1.
40, __41_, __42__, __43__, _44___, __45__, __46__, __47__, __48__

Answer:
The numbers are 40, 41, 42, 43, 44, 45, 46, 47, and 48.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 40, 41, 42, 43, 44, 45, 46, 47, and 48.

Question 2.
55, _56__, __57__, __58__, __59__, __60__, _61___, _62___, __63__

Answer:
The numbers are 55, 56, 57, 58, 59, 60, 61, 62, and 63.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 55, 56, 57, 58, 59, 60, 61, 62, and 63.

Question 3.
37, _38__, _39___, _40___, __41__, __42__, _43___, _44___, _45___

Answer:
The numbers are 38, 39, 40, 41, 42, 43, 44, and 45.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 38, 39, 40, 41, 42, 43, 44, and 45.

Question 4.
98, _99__, _100___, __101__, __102__, __103__, __104__, __105__, __106__

Answer:
The numbers are 99, 100, 101, 102, 103, 104, 105, and 106.

Explanation:
In the above-given question,
given that,
The numbers are 1 to 120.
The numbers are 99, 100, 101, 102, 103, 104, 105, and 106.

Problem Solving
Use a Counting Chart. Draw and write numbers to solve.
Question 5.
The bag has 111 marbles. Draw more marbles so there are 117 marbles in all. Write the numbers as you count.

Answer:
The numbers are 112, 113, 114, 115, and 116.

Explanation:
In the above-given question,
given that,
The bags have 111 marbles.
Draw more marbles so there are 117 marbles in all.
The numbers are 112, 113, 114, 115, and 116.

Question 6.
WRITE
Choose a number between 90 and 110. Write the number. Then count forward to write the next 5 numbers.

Answer:
The number is 116.

Explanation:
In the above-given question,
given that,
choose a number between 90 and 110.
Then count forward to write the next 5 numbers.
the numbers are 116, 117, 118, 119, and 120.

Lesson Check
Question 1.
Count forward. Write the missing number.
110, 111, 112, _113___, 114

Answer:
The missing number is 113.

Explanation:
In the above-given question,
given that,
The numbers are 110, 111, 112, and 114.
The missing number is 113.

Spiral Review
Question 2.
Solve. Write the number. There are 6 bees. 2 bees fly away. How many bees are there now?
___4__ bees

Answer:
The number of bees = 4.

Explanation:
In the above-given question,
given that,
There are 6 bees.
2 bees fly away.
The number of bees = 4.

Question 3.
Solve. Draw a model to explain. There are 8 children. 6 children are boys. The rest are girls. How many children are girls?
_____ girls

Answer:
The number of girls = 2.

Explanation:
In the above-given question,
given that,
There are 8 children.
The rest are girls.
8 – 6 = 2.
The number of girls = 2.

Lesson 6.2 Count by Tens to 120

Essential Question How do numbers change as you count by tens to 120?

Listen and Draw

Start on 10. Count forward by tens. Color each number as you say it.

Answer:
The numbers are 20, 30, 40, 50, 60, 70, 80, 90, and 100.

Explanation:
In the above-given question,
given that,
start on 10. count forward by tens.
The numbers are 20, 30, 40, 50, 60, 70, 80, 90, and 100.

MATHEMATICAL PRACTICES
Generalize Which numbers in the hundred chart did you color? Explain.

Answer:
The numbers I colored is = 20, 30, 40, 50, 60, 70, 80, 90, and 100.

Explanation:
In the above- given question,
given that,
the numbers in 100 chart.
The numbers are 20, 30, 40, 50, 60, 70, 80, 90, and 100.

Model and Draw

Start on 3. Count by tens.

3, 13, 23, 33, _43__, __53__, __63__, __73__, ___83_, __93__, _103___, __113_

Answer:
The numbers are 43, 53, 63, 73, 83, 93, and 103.

Explanation:
In the above-given question,
given that,
start on 3. count forward by tens.
The numbers are 43, 53, 63, 73, 83, 93, and 103.

Share and Show

Use a Counting Chart to count by tens. Write the numbers.
Question 1.
Start on 17.
17, _27__, _37___, __47__, __57__, __67__, _77___, _87___, __97__

Answer:
The numbers are 27, 37, 47, 57, 67, 77, 87, and 97.

Explanation:
In the above-given question,
given that,
start on 17. count forward by tens.
The numbers are 27, 37, 47, 57, 67, 77, 87, and 97.

Question 2.
Start on 1.
1, _11__, __21__, __31__, __41__, __51__, __61__, __71__, __81__

Answer:
The numbers are 11, 21, 31, 41, 51, 61, 71, and 81.

Explanation:
In the above-given question,
given that,
start on 1. count forward by tens.
The numbers are 11, 21, 31, 41, 51, 61, 71, and 81.

Question 3.
Start on 39.
39, _49__, __59__, __69__, _79___, _89___, __99__, __109__, __119__

Answer:
The numbers are 49, 59, 69, 79, 89, 99, 109, and 119.

Explanation:
In the above-given question,
given that,
start on 39. count forward by tens.
The numbers are 49, 59, 69, 79, 89, 99, 109, and 119.

On Your Own

MATHEMATICAL PRACTICE Use Patterns Use a Counting Chart. Count by tens. Write the numbers.
Question 4.
40, _50__, _60___, _70___, _80___, __90__, __100__, __110__, __120__

Answer:
The numbers are 50, 60, 70 80, 90, 100, 110, 120.

Explanation:
In the above-given question,
given that,
start on 40. count forward by tens.
The numbers are 50, 60, 70 80, 90, 100, 110, 120.

Question 5.
15, _25__, _35___, _45___, _55___, _65___, __75__, __85__, __95__

Answer:
The numbers are 25, 35, 45, 55, 65, 75, 85, and 95.

Explanation:
In the above-given question,
given that,
start on 15. count forward by tens.
The numbers are 25, 35, 45, 55, 65, 75, 85, and 95.

Question 6.
28, _38__, __48__, __58__, __68__, _78___, _88___, __98__, __108__

Answer:
The numbers are 38, 48, 58, 68, 78, 88, 98, and 108.

Explanation:
In the above-given question,
given that,
start on 28. count forward by tens.
The numbers are 38, 48, 58, 68, 78, 88, 98, and 108.

Question 7.
6, _16__, __26__, _36___, __46__, _56___, __66__, __76__, __86__

Answer:
The numbers are 16, 26, 36, 46, 56, 66, 76, and 86.

Explanation:
In the above-given question,
given that,
start on 6. count forward by tens.
The numbers are 16, 26, 36, 46, 56, 66, 76, and 86.

Question 8.
14, _24__, _34___, __44__, _54___, __64__, __74__, __84__, _94___

Answer:
The numbers are 24, 34, 54, 64, 74, 84, 94, and 104.

Explanation:
In the above-given question,
given that,
start on 14. count forward by tens.
The numbers are 24, 34, 54, 64, 74, 84, 94, and 104.

Question 9.
32, _42__, _52___, _62___, __72__, __82__, __92__, __102__, __112__

Answer:
The numbers are 42, 52, 62, 72, 82, 92, 102, and 112.

Explanation:
In the above-given question,
given that,
start on 32. count forward by tens.
The numbers are 42, 52, 62, 72, 82, 92, 102, and 112.

Question 10.
THINK SMARTER
If you start on 43 and count by tens, what number is after 73 and before 93?

Answer:
The number is 83.

Explanation:
In the above-given question,
given that,
if you start on 43 and count by tens.
the number is after 73 and before 93.
The number is 83.

Question 11.
You say me when you start on 21 and count by tens. I am after 91. I am before 111. What number am I?
___101_____

Answer:
The number is 101.

Explanation:
In the above-given question,
given that,
you say me when you start on 21 and count by tens.
I am before 111 and after 91.
The number is 101.

Problem Solving • Applications

GO DEEPER Use what you know about a Counting Chart to write the missing numbers.
Question 12.

Answer:
The missing numbers are 7, 17, 27, 28, and 29.

Explanation:
In the above-given question,
given that,
The missing numbers are 6, 16, 7, 17, 27, 28, and 29.

Question 13.

Answer:
The missing numbers are 53, 63, and 73.

Explanation:
In the above-given question,
given that,
The missing numbers are 53, 63, and 73.

Question 14.

Answer:
The missing numbers are 14, 23, 24, 33, and 34.

Explanation:
In the above-given question,
given that,
The missing numbers are 14, 23, 24, 33, and 34.

Question 15.

Answer:
The missing numbers are  99, 109, 110, 119, and 120.

Explanation:
In the above-given question,
given that,
The missing numbers are 99, 109, 110, 119, and 120.

Question 16.
THINK SMARTER
Use a Counting Chart. Count by tens. Match each number on the left to a number that is 10 more.

Answer:
The numbers are 57-67.
The numbers are 73-83.
The numbers are 77-87.
The numbers are 93-103.

Explanation:
In the above-given question,
given that,
the numbers are 57, 73, 77, and 93.
count by tens 67, 83, 87, and 103.

TAKE HOME ACTIVITY • Write these numbers: 2, 12, 22, 32, 42. Ask your child to tell you the next 5 numbers.

Count by Tens to 120 Homework & Practice 6.2

Use a Counting Chart. Count by tens. Write the numbers.
Question 1.
1, _11__, __21_, _31___, __41__, __51__, __61__, _71__, _81___

Answer:
The numbers are 11, 21, 31, 41, 51, 61, 71, 81, and 91.

Explanation:
In the above-given question,
given that,
start on 1. count forward by tens.
The numbers are 11, 21, 31, 41, 51, 61, 71, 81, and 91.

Question 2.
14, _24__, __34__, __44__, __54__, __64__, __74__, __84__, __94_, _104___

Answer:
The numbers are 24, 34, 54, 64, 74, 84, 94, 104, and 114.

Explanation:
In the above-given question,
given that,
start on 14. count forward by tens.
The numbers are 24, 34, 54, 64, 74, 84, 94, 104, and 114.

Question 3.
7, _17__, __27__, __37__, __47__, __57__, _67___, _77___, _87__, __97__

Answer:
The numbers are 17, 27, 37, 47, 57, 67, 77, 87, 97, 107, and 117.

Explanation:
In the above-given question,
given that,
start on 7. count forward by tens.
The numbers are 17, 27, 37, 47, 57, 67, 77, 87, 97, 107, and 117.

Question 4.
29, _39__, _49___, _59___, _69___, _79___, __89__, _99___, _109__, _119___

Answer:
The numbers are 39, 49, 59, 69, 79, 89, 99, 109, 119.

Explanation:
In the above-given question,
given that,
start on 29. count forward by tens.
The numbers are 39, 49, 59, 69, 79, 89, 99, 109, 119.

Question 5.
5, _15__, __25__, _35___, __45__, _55___, _65___, __75__, _85__, __95__

Answer:
The numbers are 15, 25, 35, 45, 55, 65, 75, 85, 95, 105, and 115.

Explanation:
In the above-given question,
given that,
start on 5. count forward by tens.
The numbers are 15, 25, 35, 45, 55, 65, 75, 85, 95, 105, and 115.

Question 6.
12, _22__, __32__, _42___, __52__, _62___, _72___, _82___, __92_, _102___

Answer:
The numbers are 12, 22, 32, 42, 52, 62, 72, 82, 92, 102, and 112.

Explanation:
In the above-given question,
given that,
start on 12. count forward by tens.
The numbers are 12, 22, 32, 42, 52, 62, 72, 82, 92, 102, and 112.

Question 7.
26, _36__, _46___, __56__, _66___, _76___, __86__, _96___, _106__, __116__

Answer:
The numbers are 36, 46, 56, 66, 76, 86, 96, 106, 116.

Explanation:
In the above-given question,
given that,
start on 12. count forward by tens.
The numbers are 36, 46, 56, 66, 76, 86, 96, 106, 116.

Problem Solving
Solve.
Question 8.
I am after 70.
I am before 90.
You say me when you count by tens.
What number am I? ___80___

Answer:
The number is 80.

Explanation:
In the above-given question,
given that,
I am after 70.
I am before 90.
70, 80, and 90.
The number is 80.

Question 9.
WRITE
Use numbers to explain the pattern you see when you count forward by tens.

Answer:
The numbers are 70, 80, 90, 100, 110, and 120.

Explanation:
In the above-given question,
given that,
the number is 70, forward by 10.
70. 80, 90, 100, 110, and 120.

Lesson Check
Question 1.
Count by tens. Write the missing numbers.
44, 54, 64, __74___, _84___, 94

Answer:
The missing numbers are 74 and 84.

Explanation:
In the above-given question,
Given that,
the numbers are 44, 54, 64, and 94.
The numbers are 44, 54, 64, 74, 84, and 94.

Spiral Review
Question 2.
Use the model. Write to show how you make a ten. Then add.

__13__ + _11___ + __24__
__8__ + _8___ = __16___
So, _5___ + _3___ = __8__

Answer:
The number is 18.

Explanation:
In the above-given question,
given that,
the numbers are 5 + 3 = 8.
3 + 5 = 8.
10 + 8 = 18.

Question 3.
Write a number sentence to complete the related facts.

Answer:
The numbers is = 15 – 9 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 9 + 6 = 15.
6 + 9 = 15.
the numbers is 15 – 6 = 9.
the numbers is 15 – 6 = 9.

Lesson 6.3 Understand Ten and Ones

Essential Question How can you use different ways to write a number as ten and ones?

Listen and Draw

Use to model the problem. Draw the to show your work.

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 ones.
10 + 4 = 14.
the number is 14.

MATHEMATICAL PRACTICES
Use Tools How does your picture show the books Tim has?

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 ones.
10 + 4 = 14.
the number is 14.

Share and Show

Use the model. Write the number three different ways.
Question 1.

__1__ tens _5___ ones
_10___ + __5__
__15___

Answer:
The number is 15.

Explanation:
In the above-given question,
given that,
1 ten and 5 ones.
10 + 5 = 15.
the number is 15.

Question 2.

__1__ tens ___2_ ones
__10__ + 2
__12___

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
1 ten and 2 ones.
10 + 2 = 12.
the number is 12.

On Your Own

MATHEMATICAL PRACTICE Make Connections Use the model. Write the number three different ways.
Question 3.

__1__ tens __7__ ones
__10__ + __7__
__17___

Answer:
The number is 17.

Explanation:
In the above-given question,
given that,
1 ten and 7 ones.
10 + 7 = 17.
the number is 17.

Question 4.

__1__ tens __9__ ones
_10___ + __9__
__19___

Answer:
The number is 19.

Explanation:
In the above-given question,
given that,
1 ten and 9 ones.
10 + 9 = 19.
the number is 19.

Question 5.
GO DEEPER
Draw cubes to show the number. Write the missing numbers.

__1__ tens __8__ ones
__10__ + __8__
___18__

Answer:
The number is 18.

Explanation:
In the above-given question,
given that,
1 ten and 8 ones.
10 + 8 = 18.
the number is 18.

Problem Solving • Applications

Draw cubes to show the number. Write the number three different ways.
Question 6.
David has 1 ten and 3 ones. Abby has 6 ones. They put all their tens and ones together. What number did they make?

__1__ tens ___9_ ones
__10__ + _9___
__19___

Answer:
The number is 19.

Explanation:
In the above-given question,
given that,
David has 1 ten and 3 ones.
Abby has 6 ones.
10 + 9 = 19.
the number is 19.

Question 7.
THINK SMARTER
Karen has 7 ones. Jimmy has 9 ones. They put all their ones together. What number did they make?

__0__ tens __16__ ones
__0__ + _16___
__16__

Answer:
The number is 16.

Explanation:
In the above-given question,
given that,
Karen has 7 ones. Jimmy has 9 ones.
10 + 6 = 16.
the number is 16.

Question 8.
THINK SMARTER
Does the number match the model?

Answer:
No, the number does not match the model.

Explanation:
In the above-given question,
given that,
10 + 5 = 15.
1 ten 5 ones = 15.
no, the number does not match the model.

TAKE HOME ACTIVITY • Show your child one group of 10 small objects and one group of 8 small objects. Ask your child to tell how many tens and ones there are and say the number. Repeat with other numbers from 11 to 19.

Answer:
The number is 18.

Explanation:
In the above-given question,
given that,
1 ten and 8 ones.
10 + 8 = 18.
the number is 18.

Understand Ten and Ones Homework & Practice 6.3

Use the model. Write the number three different ways.
Question 1.

__1__ tens __8__ ones
_10___ + __8__
__18__

Answer:
The number is 18.

Explanation:
In the above-given question,
given that,
1 ten and 8 ones.
10 + 8 = 18.
the number is 18.

Problem Solving
Draw cubes to show the number. Write the number different ways.
Rob has 7 ones. Nick has 5 ones. They put all their ones together. What number did they make?
Question 2.

__0__ tens _12___ ones
___0_ + __12__
__12__

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
Rob has 7 ones. Nick has 5 ones.
10 + 2 = 12.
the number is 12.

Question 3.
WRITE
Show twelve in four different ways. Use words, pictures, and numbers.

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
1 ten and 2 ones.
10 + 2 = 12.
the number is 12.

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
8 0nes and 4 ones.
8 + 4 = 12.
the number is 12.

Answer:
The number is 12.

In the above-given question,
given that,
6 ones and 6 ones.
6 + 6 = 12.
the number is 12.

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
5 ones and 7 ones.
5 + 7 = 12.
the number is 12.

Lesson Check
Question 1.
Use the model. Write the number three different ways.

__1__ tens _4___ ones
__10__ + __4__ = __14___
__14__

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 ones.
10 + 4 = 14.
the number is 14.

Spiral Review
Question 2.
Use the model. Write the addition sentence. What number sentence does this model show?

__10_ + __8___ = _18___

Answer:
The number is 18.

Explanation:
In the above-given question,
given that,
1 ten and 8 ones.
10 + 8 = 18.
the number is 18.

Question 3.
Write two subtraction facts related to 7 + 5 = 12.
_12___ – __5__ = __7__
__12__ – _7___ = __5__

Answer:
The numbers is = 12 – 5 = 7.
The numbers is = 12 – 7 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 7 + 5 = 12.
5 + 7 = 12.
the numbers is 12 – 5 = 7.
the numbers is 12 – 7 = 5.

Lesson 6.4 Make Ten and Ones

Essential Question How can you show a number as ten and ones?

Listen and Draw

Use to model the problem. Draw to show your work.

Draw to show the group of ten another way.

Answer:
The number is 18.

Explanation:
In the above-given question,
given that,
1 ten and 8 ones.
10 + 8 = 18.
the number is 18.

MATHEMATICAL PRACTICES
Compare How are the pictures the same? How are the pictures different?

Answer:
If the numbers are the same, the pictures are the same.
If the numbers are different, the pictures are different.

Explanation:
In the above-given question,
given that,
if the values are the same, the pictures are the same.
if the values are different, the pictures are different.
If the numbers are the same, the pictures are the same.
If the numbers are different, the pictures are different.
Share and Show

Use . Make groups of ten and ones. Draw your work. Write how many.
Question 1.

Answer:
The number is 11.

Explanation:
In the above-given question,
given that,
1 ten and 1 one.
10 + 1 = 11.
the number is 11.

Question 2.

__1_ ten _2___ ones

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
1 ten and 2 one.
10 + 2 = 12.
the number is 12.

Question 3.

__1__ ten _3__ ones

Answer:
The number is 13.

Explanation:
In the above-given question,
given that,
1 ten and 3 one.
10 + 3 = 13.
the number is 13.

Question 4.

__1__ ten _4__ ones

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 one.
10 + 4 = 14.
the number is 14.

On Your Own

MATHEMATICAL PRACTICE Compare Use . Make groups of ten and ones. Draw your work. Write how many.
Question 5.
__1_ ten __5__ ones

Answer:
The number is 15.

Explanation:
In the above-given question,
given that,
1 ten and 5 one.
10 + 5 = 15.
the number is 15.

Question 6.
_1__ ten __6__ ones

Answer:
The number is 16.

Explanation:
In the above-given question,
given that,
1 ten and 6 one.
10 + 6 = 16.
the number is 16.

Question 7.
__1__ ten __7__ ones

Answer:
The number is 17.

Explanation:
In the above-given question,
given that,
1 ten and 7 one.
10 + 7 = 17.
the number is 17.

Question 8.
__1__ ten __8__ ones

Answer:
The number is 18.

Explanation:
In the above-given question,
given that,
1 ten and 8 one.
10 + 8 = 18.
the number is 18.

Question 9.
__1__ ten __9__ ones

Answer:
The number is 19.

Explanation:
In the above-given question,
given that,
1 ten and 9 one.
10 + 9 = 19.
the number is 19.

Problem Solving • Applications

Solve.
Question 10.
THINK SMARTER
Emily wants to write ten and ones to show 20. What does Emily write?

__1__ ten _10__ ones

Answer:
The number is 20.

Explanation:
In the above-given question,
given that,
1 ten and 10 one.
10 + 10 = 20.
the number is 20.

Question 11.
GO DEEPER
Gina thinks of a number that has 7 ones and 1 ten. What is the number? Draw to show your work.
___17___

Answer:
The number is 17.

Explanation:
In the above-given question,
given that,
1 ten and 7 one.
10 + 7 = 17.
the number is 17.

Question 12.
Ben drew this picture to show a number. What is the number?

___15___

Answer:
The number is 15.

Explanation:
In the above-given question,
given that,
1 ten and 5 one.
10 + 5 = 15.
the number is 15.

Question 13.
THINK SMARTER
Circle the numbers that make the sentence true.

__1___ ten __4__ ones

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 one.
10 + 4 = 14.
the number is 14.

TAKE HOME ACTIVITY • Give your child numbers from 11 to 19. Have your child work with small objects to show a group of ten and a group of ones for each number.

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 one.
10 + 4 = 14.
the number is 14.

Make Ten and Ones Homework & Practice 6.4

Use . Make groups of ten and ones. Draw your work. Write how many.
Question 1.
14
fourteen
__1__ ten _4___ ones

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 one.
10 + 4 = 14.
the number is 14.

Question 2.
12
twelve
__1__ ten _2___ ones

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
1 ten and 2 one.
10 + 2 = 12.
the number is 12.

Question 3.
15
fifteen
__1__ ten __5__ ones

Answer:
The number is 15.

Explanation:
In the above-given question,
given that,
1 ten and 5 one.
10 + 5 = 15.
the number is 15.

Question 4.
18
eighteen
__1__ ten __8__ ones

Answer:
The number is 18.

Explanation:
In the above-given question,
given that,
1 ten and 8 one.
10 + 8 = 18.
the number is 18.

Problem Solving
Solve.
Question 5.
Tina thinks of a number that has 3 ones and 1 ten. What is the number?
____13__

Answer:
The number is 13.

Explanation:
In the above-given question,
given that,
1 ten and 3 one.
10 + 3 = 13.
the number is 13.

Question 6.
WRITE
Choose a number from 11 to 19. Write the number and number word. Use words and pictures to show how many tens and ones.

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 one.
10 + 4 = 14.
the number is 14.

Lesson Check
Question 1.
How many tens and ones make 17? Write the numbers.

__1___ ten __7__ ones

Answer:
The number is 17.

Explanation:
In the above-given question,
given that,
1 ten and 7 one.
10 + 7 = 17.
the number is 17.

Spiral Review
Question 2.
Use the model. Write the addition sentence. What number sentence does this model show?

_1___ + __4__ = _14___

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 one.
10 + 4 = 14.
the number is 14.

Question 3.
Choose a way to solve. Draw or write to explain. Ben has 17 books. He gives some away. He has 8 left. How many books does he give away?
___9____ books

Answer:
The books he give = 9.

Explanation:
In the above-given question,
given that,
Ben has 17 books.
He has 8 left.
17 – 9 = 8.
The books he give = 9.

Lesson 6.5 Tens

Essential Question How can you model and name groups of ten?

Listen and Draw

Use to solve the riddle. Draw and write to show your work.

MATHEMATICAL PRACTICES
Look for Structure What did you do to solve the first riddle?

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 one.
10 + 4 = 14.
the number is 14.

Share and Show

Use . Make groups of ten. Write the tens and ones.

Question 1.

Answer:
The number is 30.

Explanation:
In the above-given question,
given that,
3 tens
10 + 10 + 10 = 30.
the number is 30.

Question 2.

Answer:
The number is 40.

Explanation:
In the above-given question,
given that,
4 tens
10 + 10 + 10 + 10 = 40.
the number is 40.

On Your Own

MATHEMATICAL PRACTICE Use Repeated Reasoning Use . Make groups of ten. Write the tens and ones.
Question 3.
50 ones
__0__ tens __50__ ones

Answer:
The number is 50.

Explanation:
In the above-given question,
given that,
50 ones
10 + 10 + 10 + 10 + 10 = 50.
the number is 50.

Question 4.
60 ones
__0__ tens __60__ ones

Answer:
The number is 60.

Explanation:
In the above-given question,
given that,
60 ones
10 + 10 + 10 + 10 + 10 + 10 = 60.

Question 5.
70 ones
_0___ tens _70___ ones

Answer:
The number is 70.

Explanation:
In the above-given question,
given that,
70 ones
10 + 10 + 10 + 10 + 10 + 10 + 10 = 70.

Question 6.
80 ones
__0__ tens _80___ ones

Answer:
The number is 80.

Explanation:
In the above-given question,
given that,
80 ones
10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 80.

Question 7.
90 ones
__0__ tens _90___ ones

Answer:
The number is 90.

Explanation:
In the above-given question,
given that,
90 ones
10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 90.

Question 8.
THINK SMARTER
100 ones
__0__ tens _100___ ones

Answer:
The number is 100.

Explanation:
In the above-given question,
given that,
100 ones
10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 100.

Mid-Chapter Checkpoint

Concepts and Skills
Use a Counting Chart. Count forward. Write the numbers.
Question 1.
63, 64, _65__, __66__, _67___

Answer:
The numbers are 65, 66, and 67.

Explanation:
In the above-given question,
given that,
the numbers are 63, 64.
The numbers are 65, 66, and 67.

Question 2.
108, 109, _110___, _111___, _112.___

Answer:
The numbers are 110, 111, and 112.

Explanation:
In the above-given question,
given that,
the numbers are 108, 109.
The numbers are 110, 111, and 112.

Use a Counting Chart. Count by tens. Write the numbers.
Question 3.
42, 52, _62___, __72__, __82__

Answer:
The numbers are 62, 72, and 82.

Explanation:
In the above-given question,
given that,
the numbers are 42, 52.
The numbers are 62, 72, and 82.

Question 4.
79, 89, _99___, _109___, __119__

Answer:
The numbers are 99, 109, and 119.

Explanation:
In the above-given question,
given that,
the numbers are 79, 89.
The numbers are 99, 109, and 119.

Question 5.
Use the model. Write the number three different ways.

___1_ tens __2__ ones
_10___ + __2__
__12__

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
1 tens and 2 ones.
10 + 2 = 20.
the number is 12.

Use . Make groups of ten and ones. Draw your work. Write how many.
Question 6.

__1__ ten _5__ ones

Answer:
The number is 15.

Explanation:
In the above-given question,
given that,
1 ten and 5 one.
10 + 5 = 15.
the number is 15.

Question 7.
THINK SMARTER
Choose all the ways that name the model.

Answer:
The number is 60.

Explanation:
In the above-given question,
given that,
60 one.
0 + 60 = 60.
the number is 60.

Answer:
The number is 60.

Explanation:
In the above-given question,
given that,
60 tens and 0 one.
60 + 0 = 60.
the number is 60.

Answer:
The number is 60.

Explanation:
In the above-given question,
given that,
5 ten and 10 one.
50 + 10 = 60.
the number is 60.

Tens Homework & Practice 6.5

Use . Make groups of ten. Write the tens and ones.
Question 1.
90 ones
___0__ tens _90___ ones

Answer:
The number is 90.

Explanation:
In the above-given question,
given that,
0 ten and 90 one.
0 + 90 = 90.
the number is 90.

Question 2.
50 ones
__0__ tens _50___ ones

Answer:
The number is 50.

Explanation:
In the above-given question,
given that,
0 ten and 50 one.
0 + 50 = 50.
the number is 50.

Question 3.
40 ones
__0__ tens __40__ ones

Answer:
The number is 40.

Explanation:
In the above-given question,
given that,
0 ten and 40 one.
0 + 40 = 40.
the number is 40.

Problem Solving
Look at the model. Write the number.
Question 4.
What number does the model show?
__60____

Answer:
The number is 60.

Explanation:
In the above-given question,
given that,
0 ten and 60 one.
0 + 60 = 60.
the number is 60.

Question 5.
WRITE
Draw a quick picture and write a number to show thirty.

Answer:
The number is 30.

Explanation:
In the above-given question,
given that,
0 ten and 30 one.
0 + 30 = 30.
the number is 30.

Lesson Check
Question 1.
What number does the model show? Write the number.

__5___ tens = _50___

Answer:
The number is 50.

Explanation:
In the above-given question,
given that,
5 ten and 0 one.
50 + 0 = 50.
the number is 50.

Question 2.
What number does the model show? Write the number.

__8__ tens = _80___

Answer:
The number is 80.

Explanation:
In the above-given question,
given that,
8 ten and 0 one.
80 + 0 = 80.
the number is 80.

Spiral Review
Question 3.
Write the missing number.

Answer:
The missing number = 9.

Explanation:
In the above-given question,
given that,
6 + 9 = 13.
13 – 6 = 9.
the missing number is 9.

Question 4.
What is the sum for 3 + 3 + 4?
__10___

Answer:
The number is 10.

Explanation:
In the above-given question,
given that,
the numbers is 3, 3, and 4.
the sum for 3 + 3 + 4 = 10.
the number is 10.

Count and Model Numbers Mid-Chapter Checkpoint

Concepts and Skills

Use a Counting Chart. Count forward. Write the numbers.
Question 1.
63, 64, _65__, _66___, _67___

Answer:
The numbers are 65, 66, and 67.

Explanation:
In the above-given question,
given that,
the numbers are 63, 64.
The numbers are 65, 66, and 67.

Question 2.
108, 109, _110___, __111__, __112__

Answer:
The numbers are 110,111, and 112.

Explanation:
In the above-given question,
given that,
the numbers are 108, 109.
The numbers are 110, 111, and 112.

Use a Counting Chart. Count by tens. Write the numbers.
Question 3.
42, 52, _62___, __72__, __82__

Answer:
The numbers are 62, 72, and 82.

Explanation:
In the above-given question,
given that,
count by tens.
The numbers are 62, 72, and 82.

Question 4.
79, 89, __99__, ___109_, _119___

Answer:
The numbers are 99, 109, and 119.

Explanation:

In the above-given question,
given that,
count by tens.
The numbers are 99, 109, and 119.

Question 5.
Use the model. Write the number three different ways.

___1_ tens ___2_ ones
__10__ + _2___
_12___

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
1 ten and 2 one.
10 + 2 = 12.
the number is 12.

Use . Make groups of ten and ones. Draw your work. Write how many.
Question 6.

__1__ ten _5__ ones

Answer:
The number is 15.

Explanation:
In the above-given question,
given that,
1 ten and 5 one.
1 + 5 = 15.
the number is 15.

Question 7.
THINK SMARTER
Choose all the ways that name the model.

Answer:
The number is 60.

Explanation:
In the above-given question,
given that,
60 one.
0 + 60 = 60.
the number is 60.

Answer:
The number is 60.

Explanation:
In the above-given question,
given that,
60 tens and 0 one.
60 + 0 = 60.
the number is 60.

Answer:
The number is 60.

Explanation:
In the above-given question,
given that,
5 ten and 10 one.
50 + 10 = 60.
the number is 60.

Lesson 6.6 Tens and Ones to 50

Essential Question How can you group cubes to show a number as tens and ones?

Listen and Draw

Use to model the number. Draw to show your work.

Answer:
The number is 60.

Explanation:
In the above-given question,
given that,
5 ten and 10 one.
50 + 10 = 60.
the number is 60.

MATHEMATICAL PRACTICES
Model How did you figure out how many tens and ones are in 23?

Answer:
The number is 23.

Explanation:
In the above-given question,
given that,
2 ten and 3 one.
20 + 3 = 23.
the number is 23.

Share and Show

Use your MathBoard and
to show the tens and ones. Write the numbers.
Question 1.

___3___ tens ___5__ ones = ___35__

Answer:
The number is 35.

Explanation:
In the above-given question,
given that,
3 ten and 5 one.
30 + 5 = 35.
the number is 35.

Question 2.

___2___ tens __9___ ones = ___29__

Answer:
The number is 29.

Explanation:
In the above-given question,
given that,
2 ten and 9 one.
20 + 9 = 29.
the number is 29.

Question 3.

___4___ tens __3___ ones = _43____

Answer:
The number is 43.

Explanation:
In the above-given question,
given that,
4 ten and 3 one.
40 + 3 = 43.
the number is 43.

Question 4.

__1____ tens ___4__ ones = ___14__

Answer:
The number is 14.

Explanation:
In the above-given question,
given that,
1 ten and 4 one.
10 + 4 = 14.
the number is 14.

On Your Own

MATHEMATICAL PRACTICE Make Connections Write the numbers.
Question 5.

___3___ tens ___3__ ones = __33___

Answer:
The number is 32.

Explanation:
In the above-given question,
given that,
3 ten and 2 one.
30 + 2 = 32.
the number is 32.

Question 6.

______ tens _____ ones = _____

Answer:
The number is 46.

Explanation:
In the above-given question,
given that,
4 ten and 6 one.
40 + 6 = 46.
the number is 46.

Question 7.

__5____ tens __0___ ones = __50___

Answer:
The number is 50.

Explanation:
In the above-given question,
given that,
5 ten and 0 one.
50 + 0 = 50.
the number is 50.

Question 8.

___0___ tens __5___ ones = ___5__

Answer:
The number is 5.

Explanation:
In the above-given question,
given that,
0 ten and 5 one.
0 + 5 = 5.
the number is 5.

Question 9.
GO DEEPER
Mary drew tens and ones to show 32. She made a mistake. Draw a correct quick picture to show 32. Write the numbers.

Answer:
The number is 32.

Explanation:
In the above-given question,
given that,
3 ten and 2 one.
30 + 2 = 32.
the number is 32.

Problem Solving • Applications

Solve. Write the numbers.
Question 10.
I have 46 cubes. How many tens and ones can I make?
___4___ tens __6___ ones

Answer:
The number is 46.

Explanation:
In the above-given question,
given that,
4 ten and 6 one.
40 + 6 = 46.
the number is 46.

Question 11.
I have 32 cubes. How many tens and ones can I make?
___3___ tens __2___ ones

Answer:
The number is 32.

Explanation:
In the above-given question,
given that,
3 ten and 2 one.
30 + 2 = 32.
the number is 32.

Question 12.
I have 28 cubes. How many tens and ones can I make?
___2___ tens __8___ ones

Answer:
The number is 28.

Explanation:
In the above-given question,
given that,
2 ten and 8 one.
20 + 8 = 28.
the number is 28.

Question 13.
THINK SMARTER
I am a number less than 50. I have 8 ones and some tens. What numbers could I be?

Answer:
The number is 48.

Explanation:
In the above-given question,
given that,
4 ten and 8 one.
40 + 8 = 48.
the number is 48.

Question 14.
THINK SMARTER+
There are 35 . Jun says that there are 3 ones and 5 tens. Rob says that there are 3 tens and 5 ones. Who is correct? Circle the name.
Jun
Rob
How can you draw to show 35?

Answer:
The number is 35.

Explanation:
In the above-given question,
given that,
Rob is correct.
3 ten and 5 one.
30 + 5 = 35.
the number is 35.

TAKE HOME ACTIVITY • Write a two-digit number from 20 to 50, such as 26. Ask your child to tell which digit names the tens and which digit names the ones. Repeat with different numbers.

Answer:
The number is 26.

Explanation:
In the above-given question,
given that,
2 ten and 6 one.
20 + 6 = 26.
the number is 26.

Tens and Ones to 50 Homework & Practice 6.6

Write the numbers.
Question 1.

___3___ tens __6___ ones = __36___

Answer:
The number is 36.

Explanation:
In the above-given question,
given that,
3 ten and 6 one.
30 + 6 = 36.
the number is 36.

Question 2.

____0__ tens __8___ ones = __8___

Answer:
The number is 8.

Explanation:
In the above-given question,
given that,
0 ten and 8 one.
0 + 8 = 8.
the number is 8.

Problem Solving
Solve. Write the numbers.
Question 3.
I have 43 cubes. How many tens and ones can I make?
___4___ tens __3___ ones

Answer:
The number is 43.

Explanation:
In the above-given question,
given that,
4 ten and 3 one.
40 + 3 = 43.
the number is 43.

Question 4.
WRITE
Write a number from 20 to 50 that has both tens and ones. Use pictures and words to show the tens and ones.

Answer:
The number is 29.

Explanation:
In the above-given question,
given that,
2 ten and 9 one.
20 + 9 = 29.
the number is 29.

Lesson Check
Question 1.
What number does the model show? Write the numbers.

___2___ tens ___9__ ones = __29___

Answer:
The number is 29.

Explanation:
In the above-given question,
given that,
2 ten and 9 one.
20 + 9 = 29.
the number is 29.

Question 2.
What number does the model show? Write the numbers.

___4___ tens ___7__ ones = __47___

Answer:
The number is 47.

Explanation:
In the above-given question,
given that,
4 ten and 7 one.
40 + 7 = 47.
the number is 47.

Spiral Review
Question 3.
Write the sum?

Answer:
The number is 9.

Explanation:
In the above-given question,
given that,
the numbers are 6, 3.
6 + 3 = 9.
the number is 9.

Question 4.
Show taking from. Circle the part you take from the group. Then cross it out. Write the difference.

6 – 4 = __2____

Answer:
The number is 2.

Explanation:
In the above-given question,
given that,
the numbers are 6, 4.
6 – 4 = 2.
the number is 2.

Lesson 6.7 Tens and Ones to 100

Essential Question How can you show numbers to 100 as tens and ones?

Listen and Draw

Use to model the number. Draw a quick picture to show your work.

Answer:
The number is 25.

Explanation:
In the above-given question,
given that,
2 ten and 5 one.
20 + 5 = 25.
the number is 25.

Answer:
The number is 50.

Explanation:
In the above-given question,
given that,
5 ten and 0 one.
50 + 0 = 50.
the number is 50.

Answer:
The number is 52.

Explanation:
In the above-given question,
given that,
5 ten and 2 one.
50 + 2 = 52.
the number is 52.

MATHEMATICAL PRACTICES
Reasoning How did you figure out how many tens and ones are in 52?

Answer:
The number is 52.

Explanation:
In the above-given question,
given that,
5 ten and 2 one.
50 + 2 = 52.
the number is 52.

Share and Show

Use your MathBoard and to show the tens and ones. Write the numbers.
Question 1.

___7___ tens __9___ ones = __79__

Answer:
The number is 79.

Explanation:
In the above-given question,
given that,
7 ten and 9 one.
70 + 9 = 79.
the number is 79.

Question 2.

____5__ tens __4___ ones = __54___

Answer:
The number is 54.

Explanation:
In the above-given question,
given that,
5 ten and 4 one.
50 + 4 = 54.
the number is 54.

Question 3.

______ tens _____ ones = _____

Answer:
The number is 63.

Explanation:
In the above-given question,
given that,
6 ten and 3 one.
60 + 3 = 63.
the number is 63.

Question 4.

___8___ tens ___7__ ones = __87___

Answer:
The number is 87.

Explanation:
In the above-given question,
given that,
8 ten and 7 one.
80 + 7 = 87.
the number is 87.

On Your Own

MATHEMATICAL PRACTICE Reason Quantitatively Write the numbers.
Question 5.
__9____ tens __6___ ones = _96____

Answer:
The number is 96.

Explanation:
In the above-given question,
given that,
9 ten and 6 one.
90 + 6 = 96.
the number is 96.

Question 6.
______ tens _____ ones = _____

Answer:
The number is 69.

Explanation:
In the above-given question,
given that,
6 ten and 9 one.
60 + 9 = 69.
the number is 69.

Question 7.
___8___ tens __4___ ones = __84___

Answer:
The number is 84.

Explanation:
In the above-given question,
given that,
8 ten and 4 one.
80 + 4 = 84.
the number is 84.

Question 8.
______ tens _____ ones = _____

Answer:
The number is 72.

Explanation:
In the above-given question,
given that,
7 ten and 2 one.
70 + 2 = 72.
the number is 72.

Question 9.
____100__ tens __0___ ones = __100___

Answer:
The number is 100.

Explanation:
In the above-given question,
given that,
10 ten and 0 one.
100 + 0 = 100.
the number is 100.

Question 10.
GO DEEPER
What number is the same as 7 tens and 20 ones? __90___

Answer:
The number is 90.

Explanation:
In the above-given question,
given that,
7 ten and 20 one.
70 + 20 = 90.
the number is 90.

Question 11.
GO DEEPER
What number is the same as 5 tens and 13 ones? _____

Answer:
The number is 63.

Explanation:
In the above-given question,
given that,
6 ten and 3 one.
60 + 3 = 63.
the number is 63.

Problem Solving • Applications

Draw a quick picture to show the number. Write how many tens and ones there are.
Question 12.
Edna has 82 stamps.
__8___ tens __2___ ones

Answer:
The number is 82.

Explanation:
In the above-given question,
given that,
Edna has 82 stamps.
8 ten and 2 one.
80 + 2 = 82.
the number is 82.

Question 13.
Amy has 79 beads.
__7__ tens __9___ ones

Answer:
The number is 79.

Explanation:
In the above-given question,
given that,
Amy has 79 beads.
7 ten and 9 one.
70 + 9 = 79.
the number is 79.

Question 14.
THINK SMARTER
Moe has a group of 70 red feathers and 30 brown feathers.

___7 tens __30___ ones

Answer:
The number is 100.

Explanation:
In the above-given question,
given that,
7 ten and 30 one.
70 + 30 = 100.
the number is 100.

Question 15.
THINK SMARTER
Read the problem. Write a number to solve.
I am greater than 14.
I am less than 20.
I have 6 ones. __16____

Answer:
The number is 16.

Explanation:
In the above-given question,
given that,
I am greater than 14.
I am less than 20.
10 + 6 = 16.
the number is 16.

TAKE HOME ACTIVITY • Give your child numbers from 50 to 100. Ask your child to draw a picture to show the tens and the ones in each number and then write the number.

Tens and Ones to 100 Homework & Practice 6.7

Write the numbers.
Question 1.
____9__ tens ___8__ ones = ___98__

Answer:
The number is 98.

Explanation:
In the above-given question,
given that,
9 ten and 8 one.
90 + 8 = 98.
the number is 98.

Question 2.
____8__ tens __9___ ones = __89___

Answer:
The number is 89.

Explanation:
In the above-given question,
given that,
8 ten and 9 one.
80 + 9 = 89.
the number is 89.

Question 3.
___7___ tens __5___ ones = __75___

Answer:
The number is 75.

Explanation:
In the above-given question,
given that,
7 ten and 5 one.
70 + 5 = 75.
the number is 75.

Problem Solving
Draw a quick picture to show the number. Write how many tens and ones there are.
Question 4.
Inez has 57 shells.
____5__ tens __7___ ones

Answer:
The number is 57.

Explanation:
In the above-given question,
given that,
Inez has 57 shells.
5 ten and 7 one.
50 + 7 = 57.
the number is 57.

Question 5.
WRITE
Use words and pictures to show 59 and 95.

Answer:
The number is 59.

Explanation:
In the above-given question,
given that,
5 ten and 9 one.
50 + 9 = 59.
the number is 59.

Answer:
The number is 95.

Explanation:
In the above-given question,
given that,
9 ten and 5 one.
90 + 5 = 95.
the number is 95.

Lesson Check
Question 1.
What number has 10 tens 0 ones? _100_____

Answer:
The number is 100.

Explanation:
In the above-given question,
given that,
10 ten and 0 one.
100 + 0 = 100.
the number is 100.

Question 2.
What number does the model show? Write the numbers.
__7___ tens __4___ ones = __74___

Answer:
The number is 74.

Explanation:
In the above-given question,
given that,
7 ten and 4 one.
70 + 4 = 74.
the number is 74.

Spiral Review
Question 3.
Barry knows that 6 + 5 = 11. What other addition fact does he know? Write the new fact.
__5___ + __6___ = __11__

Answer:
The number is 11.

Explanation:
In the above-given question,
given that,
the numbers are 4, 7.
4 + 7 = 11.
the number is 11.

Question 4.
Count on to solve 2 + 6. Write the sum.
2 + 6 = ___8__

Answer:
The number is 8.

Explanation:
In the above-given question,
given that,
the numbers are 2, 6.
2 + 6 = 8.
the number is 8.

Lesson 6.8 Problem Solving • Show Numbers in Different Ways

Essential Question How can making a model help you show a number in different ways?

Gary and Jill both want 23 stickers for a class project. There are 3 sheets of 10 stickers and 30 single stickers on the table. How could Gary and Jill each take 23 stickers?

HOME CONNECTION • Showing the number with base-ten blocks helps your child explore different ways to combine tens and ones.

Try Another Problem

Use to show the number two different ways. Draw both ways.
Question 1.
46

Answer:
The number is 46.

Explanation:
In the above-given question,
given that,
4 ten and 6 one.
40 + 6 = 46.
the number is 46.

Answer:
The number is 46.

Explanation:
In the above-given question,
given that,
3 ten and 16 one.
30 + 16 = 46.
the number is 46.

Question 2.
71

Answer:
The number is 71.

Explanation:
In the above-given question,
given that,
7 ten and 1 one.
70 + 1 = 71.
the number is 71.

Answer:
The number is 71.

Explanation:
In the above-given question,
given that,
6 ten and 11 one.
60 + 11 = 71.
the number is 71.

Question 3.
65

Answer:
The number is 65.

Explanation:
In the above-given question,
given that,
6 ten and 5 one.
60 + 5 = 65.
the number is 65.

Answer:
The number is 65.

Explanation:
In the above-given question,
given that,
5 ten and 15 one.
50 + 15 = 65.
the number is 65.

MATHEMATICAL PRACTICES
Look at Exercise 3. Explain why both ways show 65.

Answer:
The number is 65.

Explanation:
In the above-given question,
given that,
6 ten and 5 one.
60 + 5 = 65.
the number is 65.

Answer:
The number is 65.

Explanation:
In the above-given question,
given that,
5 ten and 15 one.
50 + 15 = 65.
the number is 65.

Share and Show

Use to show the number two different ways. Draw both ways.
Question 4.
59

Answer:
The number is 59.

Explanation:
In the above-given question,
given that,
5 ten and 9 one.
50 + 9 = 59.
the number is 59.

Answer:
The number is 59.

Explanation:
In the above-given question,
given that,
4 ten and 19 one.
40 + 19 = 59.
the number is 59.

Question 5.
34

Answer:
The number is 34.

Explanation:
In the above-given question,
given that,
3 ten and 4 one.
30 + 4 = 34.
the number is 34.

Answer:
The number is 34.

Explanation:
In the above-given question,
given that,
2 ten and 14 one.
20 + 14 = 34.
the number is 34.

Question 6.
THINK SMARTER
Show 31 three ways.

Answer:
The number is 31.

Explanation:
In the above-given question,
given that,
3 ten and 1 one.
30 + 1 = 31.
the number is 31.

Answer:
The number is 31.

Explanation:
In the above-given question,
given that,
2 ten and 11 one.
20 + 11 = 31.
the number is 31.

Answer:
The number is 31.

Explanation:
In the above-given question,
given that,
1 ten and 21 one.
10 + 21 = 31.
the number is 31.

On Your Own

Write a number sentence to solve. Draw to explain.
Question 7.
MATHEMATICAL PRACTICE Write an Equation Felix invites 15 friends to his party. Some friends are girls. 8 friends are boys. How many friends are girls?

Answer:
The number of girls = 7.

Explanation:
In the above-given question,
given that,
Felix invites 15 friends to his party.
8 friends are boys.
7 + 8 = 15.
the number is 15.

GO DEEPER Solve. Write the numbers.
Question 8.
I am a number less than 35. I have 3 tens and some ones. What numbers can I be?
_____34______

Answer:
The number is 34.

Explanation:
In the above-given question,
given that,
I am less than 35.
30 + 4 = 34.
the number is 34.

Question 9.
THINK SMARTER+
Choose all the ways that show the same number.

Answer:
The number is 63,53,53,73,73.

Explanation:
In the above-given question,
given that,
5 tens and 3 ones.
50 + 3 = 53.
the number is 53.

TAKE HOME ACTIVITY • Have your child draw quick pictures to show the number 56 two ways.

Problem Solving • Show Numbers in Different Ways Homework & Practice 6.8

Use to show the number two different ways. Draw both ways.
Question 1.
62

Answer:
The number is 62.

Explanation:
In the above-given question,
given that,
6 ten and 2 one.
60 + 2 = 62.
the number is 62.

Answer:
The number is 62.

Explanation:
In the above-given question,
given that,
5 ten and 12 one.
50 + 12 = 62.
the number is 62.

Question 2.
38

Answer:
The number is 38.

Explanation:
In the above-given question,
given that,
3 ten and 8 one.
30 + 8 = 38.
the number is 38.

Answer:
The number is 38.

Explanation:
In the above-given question,
given that,
2 ten and 18 one.
20 + 18 = 38.
the number is 38.

Question 3.
WRITE
Draw to show 55 three different ways.

Answer:
The number is 55.

Explanation:
In the above-given question,
given that,
5 ten and 5 one.
50 + 5 = 55.
the number is 55.

Answer:
The number is 55.

Explanation:
In the above-given question,
given that,
4 ten and 15 one.
40 + 15 = 55.
the number is 55.

Answer:
The number is 55.

Explanation:
In the above-given question,
given that,
3 ten and 25 one.
30 + 25 = 55.
the number is 55.

Lesson Check
Question 1.
What number does each model show? Write the numbers.

Answer:
The number is 53.

Explanation:
In the above-given question,
given that,
5 ten and 3 one.
50 + 3 = 53.
the number is 53.

Question 2.
What number does the model show? Write the number.
__82____

Answer:
The number is 82.

Explanation:
In the above-given question,
given that,
7 ten and 12 one.
70 + 12 = 82.
the number is 82.

Spiral Review
Question 3.
Subtract to solve. Then add to check your answer.

Answer:
The number is 8.

Explanation:
In the above-given question,
given that,
12 – 4 = 8.
8 + 4 = 12
the number is 8.

Question 4.
Write two ways to make 15.
15 = __10___ + _5_____
15 = __0___ + __15____

Answer:
The number is 15.

Explanation:
In the above-given question,
given that,
1 ten and 5 one.
10 + 5 = 15.
the number is 15.

Answer:
The number is 15.

Explanation:
In the above-given question,
given that,
0 ten and 15 one.
0 + 15 = 15.
the number is 15.

Lesson 6.9 Model, Read, and Write Numbers from 100 to 110

Essential Question How can you model, read, and write numbers from 100 to 110?

Listen and Draw

Use . Circle a number to answer the question.

MATHEMATICAL PRACTICES
Look for Structure Why is 100 to the right of 99 on the hundred chart? Why is 100 below 90?

Answer:
The 100 is to the right of 99 because 100 comes after 99.
100 is below 90 because 90 comes before 100.

Explanation:
In the above-given question,
given that,
the numbers from 0 to 100.
The 100 is to the right of 99 because 100 comes after 99.
100 is below 90 because 90 comes before 100.

Share and Show

Use to model the number. Write the number.
Question 1.
10 tens and 1 more
___101__

Answer:
The number is 101.

Explanation:
In the above-given question,
given that,
10 tens and 1 more.
100 + 1 = 101.
the number is 101.

Question 2.
10 tens and 2 more
__102___

Answer:
The number is 102.

Explanation:
In the above-given question,
given that,
10 tens and 2 more.
100 + 2 = 102.
the number is 102.

Question 3.
10 tens and 3 more
_103______

Answer:
The number is 103.

Explanation:
In the above-given question,
given that,
10 tens and 3 more.
100 + 3 = 103.
the number is 103.

Question 4.
10 tens and 4 more
__104____

Answer:
The number is 104.

Explanation:
In the above-given question,
given that,
10 tens and 4 more.
100 + 4 = 104.
the number is 104.

Question 5.
10 tens and 5 more
___105___

Answer:
The number is 105.

Explanation:
In the above-given question,
given that,
10 tens and 5 more.
100 + 5 = 105.
the number is 105.

Question 6.
10 tens and 6 more
__106____

Answer:
The number is 106.

Explanation:
In the above-given question,
given that,
10 tens and 6 more.
100 + 6 = 106.
the number is 106.

On Your Own

MATHEMATICAL PRACTICE Model Mathematics Use to model the number. Write the number
Question 7.
10 tens and 7 more
__107_____

Answer:
The number is 107.

Explanation:
In the above-given question,
given that,
10 tens and 7 more.
100 + 7 = 107.
the number is 107.

Question 8.
10 tens and 8 more
_108____

Answer:
The number is 108.

Explanation:
In the above-given question,
given that,
10 tens and 8 more.
100 + 8 = 108.
the number is 108.

Question 9.
10 tens and 9 more
____109___

Answer:
The number is 109.

Explanation:
In the above-given question,
given that,
10 tens and 9 more.
100 + 9 = 109.
the number is 109.

Question 10.
10 tens and 10 more
__110_____

Answer:
The number is 110.

Explanation:
In the above-given question,
given that,
10 tens and 10 more.
100 + 10 = 110.
the number is 110.

Question 11.
THINK SMARTER
11 tens

___110____

Answer:
The number is 110.

Explanation:
In the above-given question,
given that,
11 tens
110 + 0 = 110.
the number is 110.

Write the number.
Question 12.

Answer:
The number is 109.

Explanation:
In the above-given question,
given that,
10 tens and 9 ones.
100 + 9 = 109.
the number is 109.

Question 13.

Answer:
The number is 101.

Explanation:
In the above-given question,
given that,
10 tens and 1 ones.
100 + 1 = 101.
the number is 101.

Question 14.

Answer:
The number is 104.

Explanation:
In the above-given question,
given that,
10 tens and 4 ones.
100 + 4 = 104.
the number is 104.

Question 15.

Answer:
The number is 105.

Explanation:
In the above-given question,
given that,
10 tens and 5 ones.
100 + 5 = 105.
the number is 105.

Problem Solving • Applications

GO DEEPER Solve to find the number of apples.

Question 16.

There are __103____ apples.

Answer:
The number of apples 103.

Explanation:
In the above-given question,
given that,
10 apples sets and 3 apples.
100 + 3 = 103.
the number is 103.

Question 17.

There are _108_____ apples.

Answer:
The number of apples 108.

Explanation:
In the above-given question,
given that,
10 apples sets and 8 apples.
100 + 8 = 108.
the number is 108.

Question 18.

There are ___102___ apples.

Answer:
The number of apples 102.

Explanation:
In the above-given question,
given that,
10 apples sets and 2 apples.
100 + 2 = 102.
the number is 102.

Question 19.
THINK SMARTER
What number does the model show?
_105______

Answer:
The number is 105.

Explanation:
In the above-given question,
given that,
10 tens and 5 ones.
100 + 5 = 105.
the number is 105.

TAKE HOME ACTIVITY • Give your child a group of 100 to 110 small objects. Ask him or her to make as many groups of ten as possible, then tell you the total number of small objects.

Model, Read, and Write Numbers from 100 to 110 Homework & Practice 6.9

Use to show the number. Write the number.
Question 1.
10 tens and 6 more
_106____

Answer:
The number is 106.

Explanation:
In the above-given question,
given that,
10 tens and 6 more.
100 + 6 = 106.
the number is 106.

Question 2.
10 tens and 1 more
__101___

Answer:
The number is 101.

Explanation:
In the above-given question,
given that,
10 tens and 1 more.
100 + 1 = 101.
the number is 101.

Question 3.
10 tens and 10 more
__110____

Answer:
The number is 110.

Explanation:
In the above-given question,
given that,
10 tens and 10 more.
100 + 10 = 110.
the number is 110.

Problem Solving
Question 4.
Solve to find the number of pens.

There are ___104__ pens.

Answer:
The number of pens 104.

Explanation:
In the above-given question,
given that,
10 tens and 4 more.
100 + 4 = 104.
the number is 104..

Question 5.
WRITE
Choose a number from 101 to 110. Write it. Draw a picture to show it as 10 tens and more.

Answer:
The number is 104.

Explanation:
In the above-given question,
given that,
10 tens and 4 more.
100 + 4 = 104.
the number is 104.

Lesson Check
Question 1.
What number does the model show? Write the number.

Answer:
The number is 104.

Explanation:
In the above-given question,
given that,
10 tens and 4 more.
100 + 4 = 104.
the number is 104.

Spiral Review
Question 2.
Show taking from. Circle the part you take from the group. Then cross it out. Write the difference.

4 – 3 = __1___

Answer:
The number is 1.

Explanation:
In the above-given question,
given that,
4 – 3 = 1.
the number is 1.

Question 3.
Use the model to solve. Ken has 8 toy trains. Ron has 3 toy trains. How many fewer toy trains does Ron have than Ken?

Answer:
The number is 5.

Explanation:
In the above-given question,
given that,
8 – 3 = 5.
the number is 5.

Lesson 6.10 Model, Read, and Write Numbers from 110 to 120

Essential Question How can you model, read, and write numbers from 110 to 120?

Listen and Draw

How many shells are there?

There are _104____ shells

Answer:
The number of shells is 104.

Explanation:
In the above-given question,
given that,
10 tens and 4 ones.
100 + 4 = 104.
the number is 104.

MATHEMATICAL PRACTICES
Reasoning How did you decide how many shells there are? Explain.

Answer:
The number of shells is 104.

Explanation:
In the above-given question,
given that,
10 tens and 4 ones.
100 + 4 = 104.
the number is 104.

Share and Show

Use to model the number. Write the number.
Question 1.

Answer:
The number is 111

Explanation:
In the above-given question,
given that,
11 tens and 1 more.
110 + 1 = 111.
the number is 111.

Question 2.

__112___

Answer:
The number is 112

Explanation:
In the above-given question,
given that,
11 tens and 2 more.
110 + 2 = 112.
the number is 112.

Question 3.

__113___

Answer:
The number is 113.

Explanation:
In the above-given question,
given that,
11 tens and 3 more.
110 + 3 = 113.
the number is 113.

Question 4.

___114___

Answer:
The number is 114.

Explanation:
In the above-given question,
given that,
11 tens and 4 more.
110 + 4 = 114.
the number is 114.

On Your Own

MATHEMATICAL PRACTICE Model Mathematics Use 6.10 imgg 2 to model the number. Write the number.
Question 5.

__115___

Answer:
The number is 115

Explanation:
In the above-given question,
given that,
11 tens and 5 more.
110 + 5 = 115.
the number is 115.

Question 6.

__116___

Answer:
The number is 116.

Explanation:
In the above-given question,
given that,
11 tens and 6 more.
110 + 6 = 116.
the number is 116.

Question 7.

___117___

Answer:
The number is 117.

Explanation:
In the above-given question,
given that,
11 tens and 7 more.
110 + 7 = 117.
the number is 117.

Question 8.

___118___

Answer:
The number is 118.

Explanation:
In the above-given question,
given that,
11 tens and 8 more.
110 + 8 = 118.
the number is 118.

Question 9.

Answer:
The number is 119

Explanation:
In the above-given question,
given that,
11 tens and 9 more.
110 + 9 = 119.
the number is 119.

Question 10.

Answer:
The number is 120.

Explanation:
In the above-given question,
given that,
12 tens and 0 more.
120 + 0 = 120.
the number is 120.

THINK SMARTER Write the number

Question 11.

___114__

Answer:
The number is 104.

Explanation:
In the above-given question,
given that,
11 tens and 4 more.
110 + 4 = 104.
the number is 104.

Question 12.

__111__

Answer:
The number is 111.

Explanation:
In the above-given question,
given that,
11 tens and 1 more.
110 + 1 = 111.
the number is 111.

Question 13.

____113__

Answer:
The number is 113.

Explanation:
In the above-given question,
given that,
11 tens and 3 more.
110 + 3 = 113.
the number is 113.

Problem Solving • Applications

GO DEEPER Choose a way to solve. Draw or write to explain.
Question 14.
Joe collects toy cars. He can make 11 groups of 10 toy cars. How many toy cars does Joe have?

_110____ toy cars

The number of toy cars = 110.

Explanation:
In the above-given question,
given that,
He can make 11 groups of 10 toy cars.
so, the number of toy cars = 110.

Question 15.
Cindy collects buttons. She can make 11 groups of 10 buttons and one more group of 7 buttons. How many buttons does Cindy have?

____117__ buttons

The number of buttons = 117.

Explanation:
In the above-given question,
given that,
there are 117 buttons
so, the number of teddybears = 117.

Question 16.
Lee collects marbles. He can make 11 groups of 10 marbles and has 2 marbles left over. How many marbles does Lee have?

___112____ marbles

The number of marbles = 112.

Explanation:
In the above-given question,
given that,
there are 112 marbles.
so, the number of marbles = 112.

Question 17.
THINK SMARTER
Finish the drawing to show 119.

Write to explain.

Answer:
The number is 116.

Explanation:
In the above-given question,
given that,
11 tens and 6 more.
110 + 6 = 116.
the number is 116.

TAKE HOME ACTIVITY • Give your child a group of 100 to 120 small objects. Ask him or her to make as many groups of ten as possible and then tell you the total number of small objects.

Model, Read, and Write Numbers from 110 to 120 Homework & Practice 6.10

Use to model the number. Write the number.
Question 1.

___111__

Answer:
The number is 111.

Explanation:
In the above-given question,
given that,
11 tens and 0 more.
110 + 0 = 110.
the number is 110.

Question 2.

___119__

Answer:
The number is 119.

Explanation:
In the above-given question,
given that,
11 tens and 9 more.
110 + 9 = 119
the number is 119.

Question 3.

Answer:
The number is 114.

Explanation:
In the above-given question,
given that,
11 tens and 4 more.
110 + 4 = 114.
the number is 114.

Problem Solving
Choose a way to solve. Draw or write to explain.
Question 4.
Dave collects rocks. He makes 12 groups of 10 rocks and has none left over. How many rocks does Dave have?
_____120__ rocks

Answer:
The number is 120.

Explanation:
In the above-given question,
given that,
12 tens and 0 more.
120 + 0 = 120.
the number is 120.

Question 5.
WRITE
Choose a number from 111 to 120. Write the number. Draw a picture to show it as tens and ones.

Answer:
The number is 119.

Explanation:
In the above-given question,
given that,
11 tens and 9 more.
110 + 9 = 119.
the number is 119.

Lesson Check
Question 1.
What number does the model show? Write the number.

__117____

Answer:
The number is 117.

Explanation:
In the above-given question,
given that,
11 tens and 7 more.
110 + 7 = 117.
the number is 117.

Spiral Review
Question 2.
Show how to make a ten to solve 13 − 7. Write the number sentence.

_13___ – _7___ – __6__
__10__ – __4___ = __6____
So, 13 – 7 = ____.

Answer:
The numbers is 6.

Explanation:
In the above-given question,
given that,
13 – 7 = 6.
10 – 4 = 6.
Question 3.
What is the difference? Write the number.

Answer:
The number is 5.

Explanation:
In the above-given question,
given that,
the numbers are 9, 4.
9 – 4 = 5.
so, the number is 5.

Count and Model Numbers Review/Test

Question 1.
Felix counts 46 cubes. Then he counts forward some more cubes. Write the numbers.

46, _47__, __48__, _49___, __50__, ___51__, __52__, __53__

Answer:
The numbers are 47, 48, 49, 50, 51, 52, 53.

Explanation:
In the above-given question,
given that,
the number is 46.
The numbers are 47, 48, 49, 50, 51, 52, 53.

Question 2.
Count by tens. Match each number on the left to a number that is 10 more.

Answer:
The numbers are 35, 49, 59, 65, 57.

Explanation:
In the above-given question,
given that,
the number is 35, 49, 59, 65, 57.
The numbers are 45, 59, 69, 75, and 67.

Question 3.
Does the number match the model? Choose Yes or No.

Answer:
The number is 15.

Explanation:
In the above-given question,
given that,
1 tens and 5 more.
10 + 5 = 15.
the number is 15.

Question 4.
Circle the numbers that make the sentence true.

Answer:
The number is 12.

Explanation:
In the above-given question,
given that,
1 tens and 2 more.
10 + 2 = 12.
the number is 12.

Question 5.
Choose all the ways that name the model.

Answer:
The number is 30.

Explanation:
In the above-given question,
given that,
3 tens and 0 more.
30 + 0 = 30.
the number is 30.

Question 6.
There are 42 . Lisa says that there are 4 tens and 2 ones. Elena says there are 2 tens and 4 ones. Who is correct? Circle the name.
Lisa
Elena
How can you draw to show 42?

Answer:
Lisa is correct.

Explanation:
In the above-given  question,
given that,
Lisa says that there are 4 tens and 2 ones.
Elena says there are 2 tens and 4 ones.
4 tens and 2 ones.
Lisa is correct.

Question 7.
Read the problem. Write a number to solve.
I am greater than 27.
I am less than 30.
I have 9 ones.

Answer:
The number is 29.

Explanation:
In the above-given question,
given that,
I am less than 30.
20 + 9 = 29.
the number is 29.

Question 8.
THINK SMARTER+
Choose all the ways that show the same number.

Answer:
The number is 35.

Explanation:
In the above-given question,
given that,
3 tens and 5 more.
30 + 5 = 35.
the number is 35.

Answer:
The number is 35.

Explanation:
In the above-given question,
given that,
2 tens and 15 more.
20 + 15 = 35.
the number is 35

Answer:
The number is 35.

Explanation:
In the above-given question,
given that,
1 tens and 25 more.
10 + 25 = 35.
the number is 35.

Question 9.
What number does the model show?
_110_____

Answer:
The number is 110.

Explanation:
In the above-given question,
given that,
10 tens and  10 more.
100+ 10 = 110.
the number is 110.

Question 10.
GO DEEPER
Finish the drawing to show 118.

Answer:
The number is 118.

Explanation:
In the above-given question,
given that,
11 tens and 8 more.
111 + 18 = 118.
the number is 118.

Write to explain.
Question 11.
Count the . Write the numbers.

How many tens? __2____ tens
How many ? _20____
__20___

Answer:
The number is 20.

Explanation:
In the above-given question,
given that,
2 tens and 0 more.
20 + 0 = 20.
the number is 20.

Question 12.
Draw a quick picture to show 54 in two ways. Then write the number of tens and ones in each picture.
____5_ tens ___4__ ones
__4___ tens __14____ ones

Answer:
The number is 54.

Explanation:
In the above-given question,
given that,
5 tens and 4 ones.
50 + 4 = 54.
the number is 54.

Answer:
The number is 54.

Explanation:
In the above-given question,
given that,
4 tens and 14 ones.
40 + 14 = 54.
the number is 54.

Go Math Grade 1 Chapter 5 Answer Key Addition and Subtraction Relationships

Curious George
Children tap the Liberty Bell 4 times. Then they tap it 9 more times. How many times do the children tap the bell?

Answer:
The number of times children tab the bell = 13 times.

Explanation:
In the above-given question,
given that,
Children tap the liberty bell 4 times.
Then they tap it 9 more times.
4 + 9 = 13.
The number of times children tap the bell = 13 times.

Addition and Subtraction Relationships Show What You Know

Add in Any Order

Use . Color to match.
Write each sum.

Question 1.

Answer:
The number of cubes = 4.

Explanation:
In the above-given question,
given that,
the cubes 1 + 3 = 4.
3 + 1 = 4.
so the number of cubes = 4.

Count On
Use the number line to add. Write each sum.

Question 2.
6 + 3 = _9_

Answer:
The sum of 6 and 3 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 3.
6 + 3 = 9.
the sum of 6 and 3 = 9.

Question 3.
7 + 1 = _8_

Answer:
The sum of 7 and 1 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 1.
7 + 1 = 8.
the sum of 7 and 1 = 8.

Question 4.
8 + 2 = _10_

Answer:
The sum of 8 and 2 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 2.
8 + 2 = 10.
the sum of 8 and 2 = 10.

Count Back
Use the number line to subtract. Write each difference.

Question 5.
11 – 2 = _9_

Answer:
The difference of 11 and 2 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 2.
11 – 2 = 9.
the difference of 11 and 2 = 9.

Question 6.
8 – 3 = _5_

Answer:
The difference of 8 and 3 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 3.
8 – 3 = 5.
the difference of 8 and 3 = 5.

Question 7.
9 – 1 = _8_

Answer:
The difference of 9 and 1 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 1.
9 – 1 = 8.
the difference of 9 and 1 = 8.

Addition and Subtraction Relationships Vocabulary Builder

Visualize It
Sort the review words from the box.

Understand Vocabulary

Follow the directions.

Question 1.
Write an addition fact.

Answer:
The sum of 8 and 2 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 2.
8 + 2 = 10.
the sum of 8 and 2 = 10.

Question 2.
What is the sum?
_10_

Answer:
The sum of 8 and 2 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 2.
8 + 2 = 10.
the sum of 8 and 2 = 10.

Question 3.
Write a subtraction fact.

Answer:
The difference of 8 and 3 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 3.
8 – 3 = 5.
the difference of 8 and 3 = 5.

Question 4.
What is the difference?
_5__

Answer:
The difference of 8 and 3 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 3.
8 – 3 = 5.
the difference of 8 and 3 = 5.

Addition and Subtraction Relationships Game: Add to Subtract Bingo

Materials

Play with a partner.
Each player picks or .
1. Mix the addition cards. Each player gets 8 cards. Show your cards faceup.
2. Put the subtraction cards in a pile facedown.
3. Take a subtraction card. Do you have the addition fact that helps you subtract?
4. If so, put the cards together and cover a space with a . If not, you lose a turn.
5. The first player to cover 3 spaces in a row wins.

Answer:
The difference of 8 and 3 = 5.

Explanation:
In the above-given question,
given that,
totally there are 16 cards.
so each player gets 8 cards.
I am picking the subtraction card.
8 – 3 = 5.

Addition and Subtraction Relationships Vocabulary Game

Go Fish

Materials
4 sets of word cards

How to Play
Play with two other players.

1. Mix the cards. Give 5 cards to each player. Put the rest in a pile face-down.
2. Ask a player for a word to match a word in your hand.
   • If the player has the word, he or she gives the card to you.
   • If the player does not have the word, he or she says, “Go fish.” Take a card from the pile.
3. Take turns.
4. When there are no more word cards in the pile, find all the words matched words in your cards. The player with the most matches wins.

Answer:

The sum of 8 and 3 = 11.

Explanation:
In the above-given question,
given that,
totally there are 10 cards.
so each player gets 85 cards.
I am picking the Addition card.
8 + 3 = 11.

The Write Way

Reflect
Choose one idea. Draw and write about it.
• Max wants to know if the following is correct
3 + 5 = 6 + 2
Draw and write to tell how you know.
• Tell three things you know about adding and subtracting numbers.

Answer:
The sum of 3 and 5 = 6 and 2.

Explanation:
In the above-given question,
given that,
the numbers are 3 and 5.
the numbers are 6 and 2.
3 + 5 = 8.
6 + 2 = 10.
the sum of 3 and 5 = 6 and 2.

Lesson 5.1 Problem Solving • Add or Subtract

Essential Question
How can making a model help you solve a problem?

There are 16 turtles on the beach. Some swim away. Now there are 9 turtles on the beach. How many turtles swim away?

Answer:
The number of turtles swims away = 7.

Explanation:
In the above-given question,
given that,
There are 16 turtles on the beach.
some swim away.
Now there are 9 turtles on the beach.
16 – 9 = 7.

Unlock the Problem

What do I need to find?

What information do I need to use?

Answer:
The number of turtles swims away = 7.

Explanation:
In the above-given question,
given that,
There are 16 turtles on the beach.
some swim away.
Now there are 9 turtles on the beach.
16 – 9 = 7.

Show how to solve the problem.

Answer:
The number of turtles swims away = 7.

Explanation:
In the above-given question,
given that,
There are 16 turtles on the beach.
some swim away.
Now there are 9 turtles on the beach.
16 – 9 = 7.

HOME CONNECTION
• Your child made a model to visualize the problem. The model helps your child see what part of the problem to find.

Try Another Problem

Make a model to solve. Use to help you.

Question 1.
There are 4 rabbits in the garden. Some more rabbits come. Now there are 12 rabbits. How many rabbits come to the garden?

Answer:
The number of rabbits that come to the garden  = 8.

Explanation:
In the above-given question,
given that,
There are 4 rabbits in the garden.
some more rabbits come.
Now there are 12 rabbits.
8 + 4 = 12.
The number of rabbits that come to the garden  = 8.

Question 2.
There are 14 birds in a tree. Some birds fly away. There are 9 birds still in the tree. How many birds fly away?

Answer:
The number of birds that fly away  = 5.

Explanation:
In the above-given question,
given that,
There are 14 birds in a tree.
some birds fly away.
There are 9 birds still in the tree.
14 – 9 = 5.
The number of birds that fly away  = 5.

Math Talk
MATHEMATICAL PRACTICES
Model Explain how to find the missing number.

Share and Show MATH BOARD

Make a model to solve.

Question 3.
There are 20 ducks in the pond. Then 10 ducks swim away. How many ducks are still in the pond?

20 ducks 10 swim away _10_ ducks still in the pond

Answer:
The number of ducks still in the pond = 10.

Explanation:
In the above-given question,
given that,
There are 20 ducks in the pond.
Then 10 ducks swim away.
20 – 10 = 10.
The number of ducks still in the pond  = 10.

Question 4.
THINK SMARTER
3 eagles land in the trees. Now 12 eagles are in the trees. How many eagles were in the trees to start?

Answer:
The number of eagles was in the trees to start = 9.

Explanation:
In the above-given question,
given that,
3 eagles land in the trees.
now 12 eagles are in the trees.
12 – 3 = 8.
The number of eagles was in the trees to start = 9.

Question 5.
8 squirrels are in the park. Some more squirrels come. Now there are 16 squirrels. How many squirrels come to the park?

Answer:
The number of squirrels that come to the park =  8.

Explanation:
In the above-given question,
given that,
8 squirrels are in the park.
some more squirrels come.
now there are 16 squirrels.
8 + 8 = 16.
The number of squirrels come to the park = 8.

On Your Own WRITE Math

MATHEMATICAL PRACTICE
Represent a Problem
Solve. Draw or write to show your work.

Question 6.
Liz picks 15 flowers. 7 are pink. The rest are yellow. How many are yellow?

_8_ yellow flowers

Answer:
The number of flowers that are yellow =  8.

Explanation:
In the above-given question,
given that,
Liz picks 15 flowers.
7 are pink.
the rest are yellow.
15 – 7 = 8.
The number of flowers that are yellow = 8.

Question 7.
Cindy has 14 sand dollars. She has the same number of large and small sand dollars. Write a number sentence about the sand dollars.

Answer:
The number of small dollars =  7.

Explanation:
In the above-given question,
given that,
Cindy has 14 sand dollars.
she has the same number of large and small dollars.
7 + 7 = 14.
The number of small dollars = 7.

Question 8.
THINK SMARTER
Sam has 3 more books than Ed. Sam has 8 books. How many books does Ed have?
_5_ books

Answer:
The number of books Ed has = 5.

Explanation:
In the above-given question,
given that,
Sam has 3 more books than Ed.
Sam has 8 books.
8 – 3 = 5.
The number of books Ed has = 5.

Question 9.
THINK SMARTER
There are 7 eggs in a nest. Some eggs hatch. Now there are 5 left. How many eggs hatch?

Answer:
The number of eggs hatch = 2.

Explanation:
In the above-given question,
given that,
There are 7 eggs in a nest.
some eggs hatch.
now there are 5 left.
7 – 5 = 2.
The number of eggs hatch = 2.

TAKE HOME ACTIVITY
• Ask your child to look at Exercise 7 and use the number 18 as the total number of sand dollars. Then have your child write a number sentence.

Answer:
The number of small dollars =  9.

Explanation:
In the above-given question,
given that,
Cindy has 18 sand dollars.
she has the same number of large and small dollars.
9 + 9 = 18.
The number of small dollars = 18.

Problem Solving • Add or Subtract Homework & Practice 5.1

Add or Subtract

Make a model to solve.

Question 1.
Stan has 12 stickers. Some stickers are new. 4 stickers are old. How many stickers are new?

_8_ new stickers

Answer:
The number of new stickers =  8.

Explanation:
In the above-given question,
given that,
Stan has 12 stickers.
some stickers are new.
4 stickers are old.
12 – 4 = 8.
The number of new stickers = 8.

Question 2.
Liz has 9 toy bears. Then she buys some more. Now she has 15 toy bears. How many toy bears did she buy?

_6_ toy bears

Answer:
The number of toy bears did she buy =  6.

Explanation:
In the above-given question,
given that,
The number of small dollars = 7.

Question 3.
Eric buys 6 books. Now he has 16 books. How many books did he have to start?

_10_ books

Answer:
The number of books did he have to start = 10.

Explanation:
In the above-given question,
given that,
Eric buys 6 books.
Now he has 16 books.
16 – 6 = 10.
The number of books did he have to start = 10.

Question 4.
WRITE Math
Write an addition story problem. Have a classmate solve your problem.

Lesson Check

Use the model to solve.

Question 1.
Arlo has 17 bean bag animals. Some are fuzzy. 9 bean bag animals are not fuzzy. How many animals are fuzzy?
_8_ fuzzy animals

Answer:
The number of animals that are fuzzy = 8.

Explanation:
In the above-given question,
given that,
Arlo has 17 bean bag animals.
Some are fuzzy.
9 bean bag animals are not fuzzy.
17 – 9 = 8.
The number of animals that are fuzzy = 8.

Spiral Review

Question 2.
Count back 1, 2, or 3. Write the difference.
_8_ = 11 – 3

Answer:
The difference of 11 and 3 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 3.
11 – 3 = 8.
the difference of 11 and 3 = 8.

Answer:
The difference of 11 and 2 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 2.
11 – 2 = 9.
the difference of 11 and 2 = 9.

Answer:
The difference of 11 and 1 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 1.
11 – 1 = 10.
the difference of 11 and 1 = 10.

Question 3.
Use Color to show how to make ten. Complete the addition sentence.

10 = _5_ + _5_

Answer:
The sum of 5 and 5 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 5.
5 + 5 = 10.
the sum of 5 and 5 = 10.

Lesson 5.2 Record Related Facts

Essential Question
How do related facts help you find missing numbers?

Listen and Draw

Listen to the problem.
Model with or an i Tool. Draw your model. Write the number sentence.

Answer:
The difference of 8 and 3 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 3.
8 – 3 = 5.
the difference of 8 and 3 = 5.

Answer:
The sum of 8 and 3 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 3.
8 + 3 = 11.
the sum of 8 and 3 = 11.

Math Talk
Use Tools Explain how your model helps you write your number sentence.

Share and Show MATH BOARD

Question 1.

Answer:
The sum of 8 and 7 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 7.
8 + 7 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 7 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 7.
15 – 7 = 8.
the difference of 15 and 7 = 8.

Question 2.

Answer:
The sum of 5 and 9 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 5.
9 + 5 = 14.
the sum of 5 and 9 = 14.

Answer:
The difference of 14 and 9 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 9.
14 – 9 = 5.
the difference of 14 and 9 = 5.

Question 3.

Answer:
The sum of 7 and 6 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 6.
7 + 6 = 13.
the sum of 7 and 6 = 13.

Answer:
The difference of 13 and 6 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 6.
13 – 6 = 7.
the difference of 13 and 6 = 7.

On Your Own

MATHEMATICAL PRACTICE

Analyze Relationships
Use Add or subtract. Complete the related facts.

Question 4.

Answer:
The sum of 5 and 8 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 5.
8 + 5 = 13.
the sum of 5 and 8 = 13.

Answer:
The difference of 13 and 5 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 5.
13 – 5 = 8.
the difference of 13 and 5 = 8.

Question 5.

Answer:
The sum of 8 and 9 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 8.
9 + 8 = 17.
the sum of 8 and 9 = 17.

Answer:
The difference of 17 and 8 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 8.
17 – 8 = 9.
the difference of 17 and 8 = 9.

Question 6.

Answer:
The sum of 6 and 9 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 6.
9 + 6 = 15.
the sum of 6 and 9 = 15.

Answer:
The difference of 15 and 6 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 6.
15 – 6 = 9.
the difference of 15 and 6 = 9.

Question 7.
THINK SMARTER
Circle the number sentence that has a mistake. Correct it to complete the related facts.
7 + 9 = 16
16 + 9 = 7
9 + 7 = 16
16 – 7 =9

Answer:
The number sentence that has a mistake is 16 + 9 = 7.

Answer:
In the above-given question,
given that,
the number of sentences that are correct.
7 + 9 = 16.
9 + 7 = 16.
16 – 7 = 9.
16 – 9 = 7.
The number sentence that has a mistake is 16 + 9 = 7.

Problem Solving • Applications

Question 8.
GO DEEPER
Choose three numbers to make related facts. Choose numbers between 0 and 18. Write your numbers. Write the related facts.

Answer:
The number sentence that has a mistake is 16 + 9 = 7.

Answer:
In the above-given question,
given that,
the number of sentences that are correct.
7 + 9 = 16.
9 + 7 = 16.
16 – 7 = 9.
16 – 9 = 7.
The number sentence that has a mistake is 16 + 9 = 7.

Question 9.
THINK SMARTER
Which fact is a related fact?

Answer:
The related fact = 9 – 6 = 3.

Explanation:
In the above-given question,
given that,
the numbers are 6 + 3 = 9.
3 + 6 = 9.
9 – 3 = 6.
The related fact is 9 – 6 = 3.

TAKE HOME ACTIVITY
• Write an addition fact. Ask your child to write three other related facts.

Record Related Facts Homework & Practice 5.2

Use Add or subtract. Complete the related facts.

Question 1.

Answer:
The sum of 8 and 4 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 8.
4 + 8 = 12.
the sum of 8 and 4 = 12.

Answer:
The difference of 12 and 8 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 8.
12 – 8 = 4.
the difference of 12 and 8 = 4.

Question 2.

Answer:
The sum of 5 and 4 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 4.
5 + 4 = 9.
the sum of 5 and 4 = 9.

Answer:
The difference of 9 and 4 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 5.
9 – 5 = 4.
the difference of 9 and 4 = 5.

Problem Solving

Choose a way to solve. Write or draw to explain.

Question 3.
There are 16 apples on the tree. No apples fall off. How many apples are still on the tree?

Answer:
The number of apples still on the tree =  16.

Explanation:
In the above-given question,
given that,
There are 16 apples on the tree.
no apples fall off.
The number of apples still on the tree = 16.

Question 4.
Math Write four related facts. Use pictures to show how the number sentences are related.

__________________
__________________

Answer:
The sum of 5 and 4 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 4.
5 + 4 = 9.
the sum of 5 and 4 = 9.

Answer:
The difference of 9 and 4 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 5.
9 – 5 = 4.
the difference of 9 and 4 = 5.

Lesson Check

Question 1.
Write a related fact.

Answer:
The sum of 7 and 4 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 4.
7 + 4 = 11.
the sum of 7 and 4 = 11.

Answer:
The difference of 11 and 7 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 7.
11 – 7 = 4.
the difference of 11 and 7 = 4.

Spiral Review

Question 2.
Complete the subtraction sentence.
6 – 6 = _0_

Answer:
The difference of 6 and 6 = 0.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 6.
6 – 6 = 0.
the difference of 6 and 6 = 0.

Question 3.
Write an addition sentence that helps you solve 15 − 9
_6_ + _9_ = _15_

Answer:
The difference of 15 and 9 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 9.
15 – 9 = 6.
the difference of 15 and 9 = 6.

Lesson 5.3 Identify Related Facts

Essential Question
How do you know if addition and subtraction facts are related?

Listen and Draw

Use to show 4 + 9 = 13.
Draw to show a related subtraction fact.
Write the subtraction sentence.

Answer:
The difference of 9 and 13 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 13.
13 – 9 = 4.
the difference of 13 and 9 = 4.

Math Talk
MATHEMATICAL PRACTICES
Look for Structure Why is your subtraction sentence related to 4 + 9 = 13?

Answer:
The difference of 9 and 13 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 13.
13 – 9 = 4.
the difference of 13 and 9 = 4.

Share and Show MATH BOARD

Add and subtract.
Circle the related facts

Question 1.
6 + 4 = _10_
10 – 4 =_6_

Answer:
The sum of 6 and 4 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 6.
4 + 6 = 10.
the sum of 6 and 4 = 10.

Answer:
The difference of 10 and 4 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 4.
10 – 4 = 6.
the difference of 10 and 4 = 6.

Question 2.
_17_ = 9 + 8
_9_ = 17 – 8

Answer:
The sum of 8 and 9 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 8.
9 + 8 = 17.
the sum of 8 and 9 = 17.

Answer:
The difference of 17 and 8 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 8.
17 – 8 = 9.
the difference of 17 and 8 = 9.

Question 3.
9 + 5 = _14_
9 – 5 = _4_

Answer:
The sum of 9 and 5 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 5.
9 + 5 = 14.
the sum of 9 and 5 = 14.

Answer:
The difference of 9 and 5 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 5.
9 – 5 = 4.
the difference of 9 and 5 = 4.

Question 4.
8 + 7 = _15_
15 – 7 = _8_

Answer:
The sum of 8 and 7 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 8.
7 + 8 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 7 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 7.
15 – 7 = 8.
the difference of 15 and 7 = 8.

Question 5.
_11_ = 9 + 2
_7_ = 9 – 2

Answer:
The sum of 9 and 2 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 2.
9 + 2 = 11.
the sum of 9 and 2 = 11.

Answer:
The difference of 9 and 2 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 2.
9 – 2 = 7.
the difference of 9 and 2 = 7.

Question 6.
6 + 3 = _9_
12 – 3 = _9_

Answer:
The sum of 6 and 3 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 3.
6 + 3 = 9.
the sum of 6 and 3 = 9.

Answer:
The difference of 12 and 3 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 3.
12 – 3 = 9.
the difference of 12 and 3 = 9.

Question 7.
4 + 8 = _12_
12 – 8 = _4_

Answer:
The sum of 8 and 4 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 8.
4 + 8 = 12.
the sum of 8 and 4 = 12.

Answer:
The difference of 12 and 8 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 8.
12 – 8 = 4.
the difference of 12 and 8 = 4.

Question 8.
_13_ = 7 + 6
_7_ = 13 – 6

Answer:
The sum of 7 and 6 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 6.
7 + 6 = 13.
the sum of 7 and 6 = 13.

Answer:
The difference of 13 and 6 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 6.
13 – 6 = 7.
the difference of 13 and 6 = 7.

Question 9.
9 + 9 = _18_
18 – 9 = _9_

Answer:
The sum of 9 and 9 = 18.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 9.
9 + 9 = 18.
the sum of 9 and 9 = 18.

Answer:
The difference of 18 and 9 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 18 and 9.
18 – 9 = 9.
the difference of 18 and 9 = 9.

On Your Own

Question 10.
MATHEMATICAL PRACTICE
Identify Relationships Add and subtract. Color the leaves that have related facts.

Answer:
The sum of 8 and 4 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 8.
4 + 8 = 12.
the sum of 8 and 4 = 12.

Answer:
The difference of 8 and 4 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 4.
8 – 4 = 4.
the difference of 8 and 4 = 4.

Answer:
The sum of 8 and 9 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 8.
9 + 8 = 17.
the sum of 8 and 9 = 17.

Answer:
The difference of 17 and 8 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 8.
17 – 8 = 9.
the difference of 17 and 8 = 9.

Answer:
The sum of 10 and 10 = 20.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 10.
10 + 10 = 20.
the sum of 10 and 10 = 20.

Answer:
The difference of 20 and 10 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 20 and 10.
20 – 10 = 10.
the difference of 20 and 10 = 10.

Answer:
The sum of 9 and 4 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 9.
4 + 9 = 13.
the sum of 9 and 4 = 13.

Answer:
The difference of 13 and 4 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 4.
13 – 4 = 8.
the difference of 13 and 4 = 8.

Problem Solving • Applications WRITE Math

GO DEEPER
Use the numbers to write related addition and subtraction sentences.

Question 11.

Answer:
The sum of 5 and 4 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 5.
4 + 5 = 9.
the sum of 5 and 4 = 9.

Answer:
The difference of 9 and 5 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 5.
9 – 5 = 4.
the difference of 9 and 5 = 4.

Question 12.

Answer:
The sum of 5 and 7 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 7.
5 + 7 = 12.
the sum of 5 and 7 = 12.

Answer:
The difference of 12 and 7 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 7.
12 – 7 = 5.
the difference of 12 and 7 = 5.

Question 13.

Answer:
The sum of 8 and 5 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 8.
5 + 8 = 13.
the sum of 8 and 5 = 13.

Answer:
The difference of 13 and 8 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 8.
13 – 8 = 5.
the difference of 13 and 8 = 5.

Question 14.
THINK SMARTER
Which number cannot be used to write related number sentences? Explain.

Question 15.
THINK SMARTER
Look at the facts. Are they related facts? Choose Yes or No.

Answer:
Yes, they are related facts.

Answer:
In the above-given question,
given that,
the numbers are 13 – 8 = 5.
5 + 8 = 13.
Yes, they are related facts.

TAKE HOME ACTIVITY
• Write 7, 9, 16, +, −, and = on separate slips of paper. Have your child use the slips of paper to show related facts.

Answer:
The sum of 7 and 9 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 9.
7 + 9 = 16.
the sum of 7 and 9 = 16.

Answer:
The difference of 16 and 9 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 16 and 9.
16 – 9 = 7.
the difference of 16 and 9 = 7.

Identify Related Facts Homework & Practice 5.3

Add and subtract.
Circle the related facts.

Question 1.
5 + 6 = _11_
11 – 6 = _5_

Answer:
The sum of 6 and 5 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 6.
5 + 6 = 11.
the sum of 6 and 5 = 11.

Answer:
The difference of 11 and 6 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 6.
11 – 6 = 5.
the difference of 11 and 6 = 5.

Question 2.
4 + 9 = _13_
9 – 4 = _5_

Answer:
The sum of 4 and 9 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 9.
4 + 9 = 13.
the sum of 4 and 9 = 13.

Answer:
The difference of 9 and 4 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 4.
9 – 4 = 5.
the difference of 9 and 4 = 5.

Question 3.
4 + 7 = _11_
11 – 7 = _4_

Answer:
The sum of 7 and 4 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 4.
7 + 4 = 11.
the sum of 7 and 4 = 11.

Answer:
The difference of 11 and 7 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 7.
11 – 7 = 4.
the difference of 11 and 7 = 4.

Question 4.
9 + 8 = _17_
17 – 8 = _9_

Answer:
The sum of 8 and 9 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 8.
9 + 8 = 17.
the sum of 8 and 9 = 17.

Answer:
The difference of 17 and 8 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 8.
17 – 8 = 9.
the difference of 17 and 8 = 9.

Question 5.
5 + 7 = _12_
7 – 5 = _2_

Answer:
The sum of 7 and 5 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 7.
5 + 7 = 12.
the sum of 7 and 5 = 12.

Answer:
The difference of 7 and 5 = 2.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 5.
7 – 5 = 2.
the difference of 7 and 5 = 2.

Question 6.
6 + 8 = _14_
14 – 8 = _6_

Answer:
The sum of 8 and 6 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 8.
6 + 8 = 14.
the sum of 8 and 6 = 14.

Answer:
The difference of 14 and 8 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 8.
14 – 8 = 6.
the difference of 14 and 8 = 6.

Problem Solving

Question 7.
Use the numbers to write related addition and subtraction sentences.

Answer:
The sum of 8 and 7 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 8.
7 + 8 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 8 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 8.
15 – 8 = 7.
the difference of 15 and 8 = 7.

Question 8.
WRITE Math
Use numbers and pictures to show related facts with the numbers 7, 9, and 16.

Answer:
The sum of 7 and 9 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 9.
7 + 9 = 16.
the sum of 7 and 9 = 16.

Answer:
The difference of 16 and 9 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 16 and 9.
16 – 9 = 7.
the difference of 16 and 9 = 7.

Lesson Check

Question 1.
Write a related fact for 7 + 6 = 13.

Answer:
The difference of 13 and 6 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 6.
13 – 6 = 7.
the difference of 13 and 6 = 7.

Spiral Review

Question 2.
Draw lines to match. Subtract to compare. How many fewer than are there?

Answer:
The number of fewer leaves = 1.

Explanation:
In the above-given question,
given that,
There are 8 penguins.
7 leaves.
8 – 7 = 1.
The number of fewer leaves = 1.

Question 3.
Use doubles to help you add 7 + 8.

Answer:
The sum of 8 and 7 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 8.
7 + 8 = 15.
the sum of 8 and 7 = 15.

Lesson 5.4 Use Addition to Check Subtraction

Essential Question
How can you use addition to check subtraction?

Listen and Draw

Draw and write to solve the problem.

Answer:
The sum of 8 and 7 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 8.
7 + 8 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 7 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 7.
15 – 7 = 8.
the difference of 15 and 7 = 8.

Math Talk
MATHEMATICAL PRACTICES
Look for Structure Does Erin get all her books back? Use the number sentences to explain how you know.

Share and Show MATH BOARD

Subtract. Then add to check your answer.

Question 1.

Answer:
The difference of 13 and 7 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 7.
13 – 7 = 6.
the difference of 13 and 7 = 6.

Answer:
The sum of 6 and 7 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 7.
6 + 7 = 13.
the sum of 6 and 7 = 13.

Question 2.

Answer:
The difference of 14 and 5 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 5.
14 – 5 = 9.
the difference of 14 and 5 = 9.

Answer:
The sum of 9 and 5 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 5.
9 + 5 = 14.
the sum of 9 and 5 = 14.

Question 3.

Answer:
The difference of 12 and 5 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 5.
12 – 5 = 7.
the difference of 12 and 5 = 7.

Answer:
The sum of 5 and 7 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 7.
5 + 7 = 12.
the sum of 5 and 7 = 12.

Question 4.

Answer:
The difference of 17 and 9 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 9.
17 – 9 = 8.
the difference of 17 and 9 = 8.

Answer:
The sum of 8 and 9 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 8.
9 + 8 = 17.
the sum of 8 and 9 = 17.

On Your Own

MATHEMATICAL PRACTICE
Look for Structure Subtract. Then add to check your answer.

Question 5.

Answer:
The difference of 11 and 3 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 3.
11 – 3 = 8.
the difference of 11 and 3 = 8.

Answer:
The sum of 8 and 3 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 3.
8 + 3 = 11.
the sum of 8 and 3 = 11.

Question 6.

Answer:
The difference of 13 and 9 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 9.
13 – 9 = 7.
the difference of 13 and 9 = 7.

Answer:
The sum of 9 and 7 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 7.
9 + 7 = 13.
the sum of 9 and 7 = 13.

Question 7.
THINK SMARTER
Brianna has 13 sand dollars. Some sand dollars are broken. 5 sand dollars are not broken. Write number sentences about the sand dollars.

Answer:
The number of sand dollars is not broken = 8.

Explanation:
In the above-given question,
given that,
Brianna has 13 sand dollars.
some sand dollars are broken.
5 sand dollars are not broken.
13 – 5 = 8.
The number of sand dollars is not broken = 8.

Question 8.
GO DEEPER
Subtract to solve. Then add to check your answer.
Liam took 15 balloons to the party. All but 6 of the balloons were red. How many balloons were red?
_6_ red balloons

Answer:
The number of red balloons = 6.

Explanation:
In the above-given question,
given that,
Liam took 15 balloons to the party.
All but 6 of the balloons were red.
15 – 6 = 8.
The number of red balloons = 6.

TAKE HOME ACTIVITY
• Write 11 − 7 = ☐ on a sheet of paper. Ask your child to find the difference and then write an addition sentence he or she can use to check the subtraction.

Answer:
The difference of 11 and 7 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 7.
11 – 7 = 4.
the difference of 11 and 7 = 4.

Answer:
The sum of 7 and 4 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 4.
7 + 4 = 11.
the sum of 7 and 4 = 11.

Use Addition to Check Subtraction Homework & practice 5.4

Subtract. Then add to check your answer.

Question 1.

Answer:
The difference of 12 and 4 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 4.
12 – 4 = 8.
the difference of 12 and 4 = 8.

Answer:
The sum of 8 and 4 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 8.
4 + 8 = 12.
the sum of 8 and 4 = 12.

Question 2.

Answer:
The difference of 15 and 9 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 9.
15 – 9 = 6.
the difference of 15 and 9 = 6.

Answer:
The sum of 6 and 9 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 6.
9 + 6 = 15.
the sum of 6 and 9 = 15.

Problem Solving

Subtract.
Then add to check your answer.

Question 3.
There are 13 grapes in a bowl. Justin ate some of them. Now there are only 7 grapes left. How many grapes did Justin eat?
_13_ – _7_ = _6_
_13_ – _6_ = _7_
_6_ grapes

Answer:
The number of grapes Justin eats = 6.

Explanation:
In the above-given question,
given that,
There are 13 grapes in a bowl.
Justin ate some of them.
Now there are only 7 grapes left.
13 – 7 = 6.
The number of grapes Justin eats = 6.

Question 4.
WRITE Math
Find 12 – 9. Then write or draw how you can add to check your answer.

Answer:
The difference of 12 and 9 = 3.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 9.
12 – 9 = 3.
the difference of 12  and 9 = 3.

Answer:
The sum of 9 and 3 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 3.
9 + 3 = 11.
the sum of 9 and 3 = 11.

Lesson Check

Question 1.
Subtract. Then add to check your answer.
11 – 3 = ☐
_8_ + _3_ = _11__

Answer:
The difference of 11 and 3 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 3.
11 – 3 = 8.
the difference of 11 and 3 = 8.

Answer:
The sum of 8 and 3 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 3.
8 + 3 = 11.
the sum of 8 and 3 = 11.

Question 2.
Subtract. Then add to check your answer.
12 – 8 = ☐
_8_ + _4_ = __12_

Answer:
The difference of 12 and 8 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 8.
12 – 8 = 4.
the difference of 12 and 8 = 4.

Answer:
The sum of 8 and 4 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 4.
8 + 4 = 12.
the sum of 8 and 4 = 12.

Spiral Review

Question 3.
Jonas picks 10 peaches. 4 peaches are small. The rest are big. How many are big?

_6_ big peaches

Answer:
The number of big peaches = 6.

Explanation:
In the above-given question,
given that,
Jonas picks 10 peaches.
4 peaches are small.
The number of big peaches = 6.

Question 4.
Circle two addends to add first. Write the sum.

__________
__________

Answer:
The sum of 6 and 4 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 4.
3 + 3 + 4 = 10.
the sum of 6 and 4 = 10.

Addition and Subtraction Relationships Mid-Chapter Checkpoint

Use . Add or subtract.
Complete the related facts.

Question 1.

Answer:
The sum of 6 and 8 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 8.
6 + 8 = 14.
the sum of 6 and 8 = 14.

Answer:
The difference of 14 and 8 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 8.
14 – 8 = 6.
the difference of 14 and 8 = 6.

Question 2.

Answer:
The sum of 7 and  6 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 6.
7 + 6 = 11.
the sum of 7 and 6 = 11.

Answer:
The difference of 11 and 6 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 6.
11 – 6 = 7.
the difference of 11 and 6 = 7.

Add and subtract. Circle the related facts.

Question 3.
9 + 3 = _12_
9 – 3 = _6_

Answer:
The sum of 9 and 3 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 3.
9 + 3 = 12.
the sum of 9 and 3 = 12.

Answer:
The difference of 9 and 3 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 3.
9 – 3 = 6.
the difference of 9 and 3 = 6.

Question 4.
7 + 8 = _15_
15 – 8 = _7_

Answer:
The sum of 7 and 8 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 8.
7 + 8 = 15.
the sum of 7 and 8 = 15.

Answer:
The difference of 15 and 8 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 8.
15 – 8 = 7.
the difference of 15 and 8 = 7.

Question 5.
_11_ = 6 + 5
_1_ = 6 – 5

Answer:
The sum of 6 and 5 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 5.
6 + 5 = 11.
the sum of 6 and 5 = 11.

Answer:
The difference of 6 and 5 = 1.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 5.
6 – 5 = 1.
the difference of 6 and 5 = 1.

Question 6.
THINK SMARTER
Complete the subtraction. Then write an addition sentence to check the subtraction.

Answer:
The difference of 11 and 2 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 2.
11 – 2 = 9.
the difference of 11 and 2 = 9.

Lesson 5.5 Algebra • Unknown Numbers

Essential Question
How can you use a related fact to find an unknown number?

Listen to the problem. Use to show the story. Draw to show your work

Answer:
The difference of 6 and 5 = 1.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 5.
6 – 5 = 1.
the difference of 6 and 5 = 1.

Math Talk
MATHEMATICAL PRACTICES
Describe How many toy cars are blue? Explain how you got your answer

Share and Show MATH BOARD

Use to find the unknown numbers. Write the numbers.

Question 1.
8 + ☐ = 15
15 – 8 = ☐

Answer:
The sum of 8 and 7 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 7.
8 + 7 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 8 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 8.
15 – 8 = 7.
the difference of 15 and 8 = 7.

Question 2.
13 = 9 + ☐
☐ = 13 – 9

Answer:
The sum of 9 and 4 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 4.
9 + 4 = 13.
the sum of 9 and 4 = 13.

Answer:
The difference of 13 and 9 = 4.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 9.
13 – 9 = 4.
the difference of 13 and 9 = 4.

Question 3.
5 + ☐ = 14
14 – 5 = ☐

Answer:
The sum of 5 and 9 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 9.
5 + 9 = 14.
the sum of 5 and 9 = 14.

Answer:
The difference of 14 and 5 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 5.
14 – 5 = 9.
the difference of 14 and 5 = 9.

Question 4.
14 = 6 + ☐
☐ = 14 – 6

Answer:
The sum of 6 and 9 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 9.
6 + 9 = 14.
the sum of 6 and 9 = 14.

Answer:
The difference of 14 and 6 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 6.
14 – 6 = 9.
the difference of 14 and 6 = 9.

Question 5.
9 + ☐ = 16
16 – 9 = ☐

Answer:
The sum of 9 and 7 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 7.
9 + 7 = 16.
the sum of 9 and 7 = 16.

Answer:
The difference of 16 and 9 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 16 and 9.
16 – 9 = 7.
the difference of 16 and 9 = 7.

Question 6.
17 = 8 + ☐
☐ = 17 – 8

Answer:
The sum of 8 and 9 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 9.
8 + 9 = 17.
the sum of 8 and 9 = 17.

Answer:
The difference of 17 and 8 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 8.
17 – 8 = 9.
the difference of 17 and 8 = 9.

On Your Own

MATHEMATICAL PRACTICE

Identify Relationships Write the unknown numbers. Use if you need to.

Question 7.
7 + ☐ = 15
15 – 7 = ☐

Answer:
The sum of 8 and 7 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 7.
8 + 7 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 7 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 7.
15 – 7 = 8.
the difference of 15 and 7 = 8.

Question 8.
5 + ☐ = 11
11 – 5 = ☐

Answer:
The sum of 5 and 6 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 6.
5 + 6 = 11.
the sum of 5 and 6 = 11.

Answer:
The difference of 11 and 5 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 5.
11 – 5 = 6.
the difference of 11 and 5 = 6.

Question 9.
☐ + 10 = 20
20 – 10 = ☐

Answer:
The sum of 10 and 10 = 20.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 10.
10 + 10 = 20.
the sum of 10 and 10 = 20.

Answer:
The difference of 20 and 10 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 20 and 10.
20 – 10 = 10.
the difference of 20 and 10 = 10.

Question 10.
☐ + 9 = 16
16 – 9 = ☐

Answer:
The sum of 9 and 7 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 7.
9 + 7 = 16.
the sum of 9 and 7 = 16.

Answer:
The difference of 16 and 9 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 16 and 9.
16 – 9 = 7.
the difference of 16 and 9 = 7.

Question 11.
☐ = 9 + 9
9 = ☐ – 9

Answer:
The sum of 9 and 9 = 18.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 9.
9 + 9 = 18.
the sum of 9 and 9 = 18.

Answer:
The difference of 18 and 9 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 18 and 9.
18 – 9 = 9.
the difference of 18 and 9 = 9.

Question 12.
☐ = 5 + 8
5 = ☐ – 8

Answer:
The sum of 5 and 8 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 5.
8 + 5 = 13.
the sum of 8 and 5 = 13.

Answer:
The difference of 8 and 5 = 3.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 8.
8 – 5 = 3.
the difference of 8 and 5 = 3.

Question 13.
THINK SMARTER
Solve. Rick has 10 party hats. He needs 19 hats for his party. How many more party hats does Rick need?

_9_ party hats

Answer:
The number of party hats Rick needs = 9.

Explanation:
In the above-given question,
given that,
Rick has 10 party hats.
He needs 19 hats for his party.
19 – 10 = 9.
The number of party hats Rick needs = 9.

Problem Solving • Applications WRITE Math

Use cubes or draw a picture to solve.

Question 14.
Todd has 12 bunnies. He gives 4 bunnies to his sister. How many bunnies does Todd have now?

_8_ bunnies

Answer:
The number of bunnies does Todd has = 8.

Explanation:
In the above-given question,
given that,
Todd has 12 bunnies.
He gives 4 bunnies to his sister.
12 – 4 = 8.
The number of bunnies does Todd has = 8.

Question 15.
Brad has 11 trucks. Some are small trucks. 4 are big trucks. How many small trucks does he have?

_7_ small trucks

Answer:
The number of small trucks = 7.

Explanation:
In the above-given question,
given that,
Brad has 11 trucks.
Some are small trucks.
4 are big trucks.
11 – 4 = 7.
The number of small trucks = 7.

Question 16.
GO DEEPER
There are 15 children at the park. 6 of the children go home. Then 4 more children come to the park. How many children are in
the park now?

_13_ children

Answer:
The number of children is in the park = 13.

Explanation:
In the above-given question,
given that,
There are 15 children at the park.
6 of the children go home.
Then 4 more children come to the park.
15 – 6 + 4.
9 + 4 = 13.
The number of children is in the park = 13.

Question 17.
THINK SMARTER
Use to find the unknown numbers. Write the numbers.

9 + _8_ = 17
17 – 9 = _8_

Answer:
The sum of 9 and 8 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 8.
9 + 8 = 17.
the sum of 9 and 8 = 17.

Answer:
The difference of 17 and 9 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 9.
17 – 9 = 8.
the difference of 17 and 9 = 8.

TAKE HOME ACTIVITY
• Have your child explain how using subtraction can help him or her find the unknown number in 7 + ☐ = 16.

Answer:
The sum of 7 and 9 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 9.
7 + 9 = 16.
the sum of 7 and 9 = 16.

Answer:
The difference of 16 and 9 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 16 and 9.
16 – 9 = 7.
the difference of 16 and 9 = 7.

Algebra • Unknown Numbers Homework & Practice 5.5

Write the missing numbers. Use if you need to.

Question 1.
6 + ☐ = 13
13 – 6 = ☐

Answer:
The sum of 6 and 7 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 7.
6 + 7 = 13.
the sum of 6 and 7 = 13.

Answer:
The difference of 13 and 6 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 6.
13 – 6 = 7.
the difference of 13 and 6 = 7.

Question 2.
9 + ☐ = 14
14 – 9 = ☐

Answer:
The sum of 9 and 5 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 5.
9 + 5 = 14.
the sum of 9 and 5 = 14.

Answer:
The difference of 14 and 9 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 9.
14 – 9 = 5.
the difference of 14 and 9 = 5.

Question 3.
☐ + 7 = 15
15 – 7 = ☐

Answer:
The sum of 7 and 8 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 7.
8 + 7 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 7 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 7.
15 – 7 = 8.
the difference of 15 and 7 = 8.

Question 4.
☐ = 8 + 8
8 = ☐ – 8

Answer:
The sum of 8 and 8 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 8.
8 + 8 = 16.
the sum of 8 and 8 = 16.

Answer:
The difference of 16 and 8 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 16 and 8.
16 – 8 = 8.
the difference of 8 and 8 = 16.

Problem Solving

Use cubes or draw a picture to solve.

Question 5.
Sally has 9 toy trucks. She gets 3 more toy trucks. How many toy trucks does she have now?
_12_ toy trucks

Answer:
The number of trucks she has now = 12.

Explanation:
In the above-given question,
given that,
Sally has 9 toy trucks.
She gets 3 more toy trucks.
9 + 3 = 12.
The number of trucks she has now = 12.

Question 6.
WRITE Math
Use words, pictures, or numbers to show how to find the unknown numbers for 8 + _9_ = 17 and 17 – 8 = _9_.

Answer:
The sum of 9 and 8 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 9.
8 + 9 = 17.
the sum of 8 and 9 = 17.

Answer:
The difference of 17 and 8 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 8.
17 – 8 = 9.
the difference of 17 and 8 = 9.

Lesson Check

Question 1.
Write the unknown number.
9 + ☐ = 16

Answer:
The sum of 9 and 7 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 9.
7 + 9 = 16.
the sum of 7 and 9 = 16.

Spiral Review

Question 2.
What is 14 − 6?

Answer:
The difference of 14 and 6 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 6.
14 – 6 = 8.
the difference of 14 and 6 = 8.

Question 3.
Draw circles to show the number. Write the sum. 0 + 8

0 + 8 = _8_

Answer:
The sum of 0 and 8 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 0 and 8.
0 + 8 = 8.
the sum of 0 and 8 = 8.

Lesson 5.6 Algebra • Use Related Facts

Essential Question
How can you use a related fact to find an unknown number?

Listen and Draw

What number can you add to 8 to get 10? Draw a picture to solve. Write the unknown number.

8 + ☐ = 10

Answer:
The number is 2.

Explanation:
In the above-given question,
given that,
10 – 8 = 2.
The number is 2.

Math Talk
MATHEMATICAL PRACTICES
Model Describe how to solve this problem using cubes.

Share and Show MATH BOARD

Write the unknown numbers.

Question 1.
Find 14 – 8.

8 + _6_ = 14
14 – 8 = _6_

Answer:
The sum of 6 and 8 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 9.
8 + 6 = 14.
the sum of 8 and 6 = 14.

Answer:
The difference of 14 and 8 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 6.
14 – 8 = 6.
the difference of 14 and 8 = 6.

Question 2.
Find 17 − 8

8 + _9_ = 17
17 − 8 = _9_

Answer:
The sum of 9 and 8 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 9.
8 + 9 = 17.
the sum of 8 and 9 = 17.

Answer:
The difference of 17 and 8 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 8.
17 – 8 = 9.
the difference of 17 and 8 = 9.

Question 3.
Find 11 − 6.

6 + _5_ = 11
11 – 6 = _5_

Answer:
The sum of 6 and 5 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 5.
6 + 5 = 11.
the sum of 6 and 5 = 11.

Answer:
The difference of 11 and 6 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 6.
11 – 6 = 5.
the difference of 11 and 6 = 5.

Question 4.
Find 15 − 9

9 + _6_ = 15
15 − 9 = _6_

Answer:
The sum of 9 and 6 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 9.
6 + 9 = 15.
the sum of 6 and 9 = 15.

Answer:
The difference of 15 and 9 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 9.
15 – 9 = 6.
the difference of 15 and 9 = 6.

On Your Own

Write the unknown numbers.

Question 5.
Find 20 − 10.

10 + _10_ = 20
20 – 10 = _10_

Answer:
The sum of 10 and 10 = 20.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 10.
10 + 10 = 20.
the sum of 10 and 10 = 20.

Answer:
The difference of 20 and 10 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 20 and 10.
20 – 10 = 10.
the difference of 20 and 10 = 10.

Question 6.
Find 13 − 4.

4 + _9_ = 13
13 – 4 = _9_

Answer:
The sum of 4 and 9 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 9.
4 + 9 = 13.
the sum of 4 and 9 = 13.

Answer:
The difference of 13 and 4 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 4.
13 – 4 = 9.
the difference of 13 and 4 = 9.

Question 7.
Find 12 − 7.

7 + _5_ = 12
12 – 7 = _5_

Answer:
The sum of 7 and 5 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 5.
7 + 5 = 12.
the sum of 7 and 5 = 12.

Answer:
The difference of 12 and 7 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 7.
12 – 7 = 5.
the difference of 12 and 7 = 5.

Question 8.
Find 15 − 8.

8 + _7_ = 15
15 – 8 = _7_

Answer:
The sum of 7 and 8 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 7.
8 + 7 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 8 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 8.
15 – 8 = 7.
the difference of 15 and 8 = 7.

GO DEEPER
Write an addition sentence to help you find the difference. Then write the related subtraction sentence to solve.

Question 9.
Find 11 − 5.
_5_ + _6_ = _11_
_6_ + _5_ = _11_

Answer:
The sum of 6 and 5 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 5.
6 + 5 = 11.
the sum of 6 and 5 = 11.

Answer:
The sum of 5 and 6 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 6.
5 + 6 = 11.
the sum of 5 and 6 = 11.

Answer:
The difference of 11 and 5 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 5.
11 – 5 = 6.
the difference of 11 and 5 = 6.

Question 10.
Find 13 − 6.
_6_ + _7_ = _13_
_7_ + _6_ = _13_

Answer:
The sum of 6 and 7 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 7.
6 + 7 = 13.
the sum of 6 and 7 = 13.

Answer:
The sum of 7 and 6 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 6.
7 + 6 = 13.
the sum of 7 and 6 = 13.

Answer:
The difference of 13 and 6 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 6.
13 – 6 = 7.
the difference of 13 and 6 = 7.

Problem Solving • Applications

Reason Abstractly Look at the shapes in the addition sentence. Draw shapes to show a related subtraction fact.

Question 11.

Answer:
The sum of 6 and 8 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 9.
8 + 6 = 14.
the sum of 8 and 6 = 14.

Answer:
The difference of 14 and 8 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 6.
14 – 8 = 6.
the difference of 14 and 8 = 6.

Question 12.

Answer:
The sum of 5 and 8 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 5.
8 + 5 = 13.
the sum of 8 and 5 = 13.

Answer:
The difference of 8 and 5 = 3.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 8.
8 – 5 = 3.
the difference of 8 and 5 = 3.

Question 13.
THINK SMARTER

Answer:
The sum of 7 and 8 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 7.
8 + 7 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 7 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 7.
15 – 7 = 8.
the difference of 15 and 7 = 8.

Question 14.
THINK SMARTER
Which is the unknown number in these related facts?

Answer:
The unknown number is 7.

Explanation:
In the above-given question,
Given that,
The numbers are 5, 7, 8, and 9.
The unknown number is 7.

TAKE HOME ACTIVITY
• Give your child 5 small objects, such as paper clips. Then ask your child how many more objects he or she would need to have 12.

Algebra • Use Related Facts Homework & practice 5.6

Write the missing numbers.

Question 1.
Find 16 − 9.

Answer:
The unknown number is 7.

Explanation:
In the above-given question,
Given that,
The sum of 9 and 7 = 16.
the difference of 16 and 9 = 7.
The unknown number is 7.

Question 2.
Find 12 − 7

Answer:
The unknown number is 5.

Explanation:
In the above-given question,
Given that,
The sum of 5 and 7 = 12.
the difference of 12 and 7 = 5.
The unknown number is 5.

Question 3.
Find 15 − 6.

Answer:
The unknown number is 9.

Explanation:
In the above-given question,
Given that,
The sum of 9 and 6 = 15.
the difference of 15 and 6 = 9.
The unknown number is 9.

Question 4.
Find 18 − 9.

Answer:
The unknown number is 9.

Explanation:
In the above-given question,
Given that,
The sum of 9 and 9 = 18.
the difference of 18 and 9 = 9.
The unknown number is 9.

Problem Solving

Look at the shapes in the addition sentence. Draw a shape to show a related subtraction fact.

Question 5.

Answer:
The sum of 7 and 8 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 7.
8 + 7 = 15.
the sum of 8 and 7 = 15.

Answer:
The difference of 15 and 7 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 7.
15 – 7 = 8.
the difference of 15 and 7 = 8.

Question 6.
WRITE Math
Draw pictures to show how to solve 14 – 7 = _7__ and 7 + _7__ = 14.

Answer:
The sum of 7 and  7 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 7.
7 + 7 = 14.
the sum of 7 and 7 = 14.

Answer:
The difference of 14 and 7 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 7.
14 – 7 = 7.
the difference of 14 and 7 = 7.

Lesson Check

Question 1.
Write an addition fact that helps you solve 12 – 4
_8_ + _4_ = _12_

Spiral Review

Question 2.
Circle the greater addend. Count on to find the sum.

Answer:
The sum of 9 and  3 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 3.
9 + 3 = 12.
the sum of 9 and 3 = 12.

Question 3.
Draw to show the doubles fact. Write the sum.

Answer:
The sum of 8 and  8 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 8.
8 + 8 = 16.
the sum of 8 and 8 = 16.

Lesson 5.7 Choose an Operation

Essential Question
How do you choose when to add and when to subtract to solve a problem?

Listen and Draw

Listen to the problem. Use to solve. Draw a picture to show your work.

_3_ white balloons

Math Talk
MATHEMATICAL PRACTICES
How did you solve this problem? Explain.

Model and Draw

Mary sees 8 squirrels. Jack sees 9 more squirrels than Mary. How many squirrels does Jack see? Do you add or subtract to solve?

Answer:
The number of squirrels does jack see = 17.

Explanation:
In the above-given question,
given that,
Mary sees 8 squirrels.
jack sees 9 more squirrels than mary.
8 + 9 = 13.
The number of squirrles does jack see = 17.

Share and Show MATH BOARD

Circle add or subtract. Write a number sentence to solve.

Question 1.
Hanna has 5 markers. Owen has 9 more markers than Hanna. How many markers does Owen have?
add subtract

Answer:
The number of markers does Owen has = 14.

Explanation:
In the above-given question,
given that,
Hanna has 5 markers.
Owen has 9 more markers than Hanna.
5 + 9 = 14.
The number of markers does Owen has = 14.

Question 2.
Angel has 13 apples. He gives some away. Then there were 5 apples. How many apples does he give away?
add subtract

Answer:
The number of apples he gives = 8.

Explanation:
In the above-given question,
given that,
Angel has 13 apples.
He gives some away.
Then there were 5 apples.
13 – 5 = 8.
The number of apples he gives = 8.

Question 3.
Deon has 18 blocks. He builds a house with 9 of the blocks. How many blocks does Deon have now?
add subtract

Answer:
The number of blocks does Deon has now = 9.

Explanation:
In the above-given question,
given that,
Deon has 18 blocks.
He builds a house with 9 of the blocks.
18 – 9 = 9.
The number of blocks Does has now = 9.

On Your Own

Circle add or subtract. Write a number sentence to solve.

Question 4.
Rob sees 5 raccoons. Talia sees 4 more raccoons than Rob. How many raccoons do they see?
add subtract

______9______
__9__ raccoons

Answer:
The number of raccoons they see = 9.

Explanation:
In the above-given question,
given that,
Rob sees 5 raccoons.
Talia sees 4 more raccoons than Rob.
5 + 4 = 9.
The number of raccoons they see = 9.

Question 5.
Eli has a box with 12 eggs. His other box has no eggs. How many eggs are in both boxes?
add subtract

___12_________
_12___ eggs

Answer:
The number of eggs in both the boxes = 12.

Explanation:
In the above-given question,
given that,
Eli has a box with 12 eggs.
His other box has no eggs.
12 + 0 = 12.
The number of eggs in both the boxes = 12.

Question 6.
Leah has a bowl with 16 fish. Some fish have long tails. 7 fish have short tails. How many fish have long tails?
add subtract

__9__________
__9__ fish

Answer:
The number of fish have long tails  = 9.

Explanation:
In the above-given question,
given that,
Leah has a bowl with 16 fish.
some fish have long tails.
16 – 7 = 9.
The number of fish have long tails = 9.

Question 7.
GO DEEPER Sasha has 8 red apples. She has 3 fewer green apples than red apples. How many apples does she have?
add subtract

___13___
_13_ apples

Answer:
The number of apples have = 13.

Explanation:
In the above-given question,
given that,
Sasha has 8 red apples.
she has 3 fewer green apples than red apples.
8 + 5 = 13.
The number of apples have = 13.

Problem Solving • Applications

MATHEMATICAL PRACTICE

Apply Choose a way to solve. Write or draw to explain.

Question 8.
James has 4 big markers and 7 skinny markers. How many markers does he have?

_11_ markers

Answer:
The number of markers James has =  11.

Explanation:
In the above-given question,
given that,
James has 4 big markers and 7 skinny markers.
7 + 4 = 11.
The number of markers james has = 11.

Question 9.
Sam has 9 baseball cards. She wants to have 17 cards. How many more cards does she need?

_8_ more cards

Answer:
The number of cards she needs more = 8.

Explanation:
In the above-given question,
given that,
Sam has 9 baseball cards.
she wants to have 17 cards.
The number of cards does she need = 8.

Question 10.
THINK SMARTER
Annie gets 15 pennies on Monday. She gets 1 more penny each day. How many pennies does she have on Friday?

_19_ pennies

Answer:
The number of pennies does she have on Friday = 19.

Explanation:
In the above-given question,
given that,
Annie gets 15 pennies on Monday.
She gets 1 more penny each day.
15 + 4 = 19.
The number of pennies does she have on Friday = 19.

Question 11.
THINK SMARTER
Beth has 5 grapes. A friend gives her 8 grapes. How many grapes does Beth have now? Draw a picture to show your work.
Beth has _13_ grapes.

Answer:
The number of grapes does Beth has now =13.

Explanation:
In the above-given question,
given that,
Beth has 5 grapes.
A friend gives her 8 grapes.
5 + 8 = 13.
The number of grapes does Beth has now =13.

TAKE HOME ACTIVITY
• Ask your child to write a number sentence that could be used to solve Exercise 9.

Choose an Operation Homework & Practice 5.7

Circle add or subtract. Write a number sentence to solve.

Question 1.
Adam has a bag of 11 pretzels. He eats 2 of the pretzels. How many pretzels are left?

____13______
_13_ pretzels

Answer:
The number of pretzels left = 13.

Explanation:
In the above-given question,
given that,
Adam has a bag of 11 pretzels.
He eats 2 of the pretzels.
11 + 2 = 13.
The number of pretzels left = 13.

Problem Solving

Choose a way to solve. Write or draw to explain.

Question 2.
Greg has 11 shirts. 3 have long sleeves. The rest have short sleeves. How many short-sleeve shirts does Greg have?
_8_ short-sleeve shirts

Answer:
The number of short-sleeve does Greg has = 8.

Explanation:
In the above-given question,
given that,
Greg has 11 shirts. 3 have long sleeves.
The rest have short sleeves.
11 – 3 = 8.
The number of short-sleeves does Greg has = 8.

Question 3.
WRITE Math
Use words, numbers, or pictures to explain how a classmate solved a problem.

Answer:
The number of short-sleeve does Greg has = 8.

Explanation:
In the above-given question,
given that,
Greg has 11 shirts. 3 have long sleeves.
The rest have short sleeves.
11 – 3 = 8.
The number of short-sleeves does Greg has = 8.

Lesson Check

Question 1.
Circle add or subtract. Write a number sentence to solve. There are 18 children on the bus. Then 9 children get off. How many children are left on the bus?

Answer:
The number of children left on the bus = 9.

Explanation:
In the above-given question,
given that,
There are 18 children on the bus.
Then 9 children get off.
18 – 9 = 9.
The number of children left on the bus = 9.

Spiral Review

Question 2.
Choose a way to solve. Draw or write to explain. Mike has 13 plants. He gives some away. He has 4 left. How many plants does he give away?
_9_ plants

Answer:
The number of plants does he give = 9.

Explanation:
In the above-given question,
given that,
Mike has 13 plants.
He gives some away. He has 4 left.
13 – 4 = 9.
The number of plants does he give = 9.
Question 3.
Write the numbers 3, 2, and 8 in an addition sentence. Show two more ways to find the sum.
_3_ + _2_ + _8 = _13_
_5_ + _8_ = _13_
_8_ + _5_ = _13_

Answer:
The sum of 5 and 8 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 8.
5 + 8 = 13.
the sum of 5 and 8 = 13.

Answer:
The sum of 8 and 5 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 5.
8 + 5 = 13.
the sum of 8 and 5 = 13.

Lesson 5.8 Algebra • Ways to Make Numbers to 20

Essential Question
How can you add and subtract in different ways to make the same number?

Listen and Draw

Use . Show two ways to make 10. Draw to show your work.

Answer:
The sum of 5 and 5 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 5.
5 + 5 = 10.
the sum of 5 and 5 = 10.

Answer:
The sum of 6 and 4 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 4.
6 + 4 = 10.
the sum of 6 and 4 = 10.

Math Talk
MATHEMATICAL PRACTICES
Use Tools How do your models show two ways to make 10?

Share and Show MATH BOARD

Use . Write ways to make the number at the top.

Question 1.

Answer:
The sum of 8 and 5 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 5.
8 + 5 = 13.
the sum of 8 and 5 = 13.

Question 2.

Answer:
The sum of 5 and 5 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 5.
5 + 5 = 10.
the sum of 5 and 5 = 10.

On Your Own

MATHEMATICAL PRACTICE
Use Appropriate Tools
Use . Write ways to make the number at the top.

Question 3.

Answer:
The sum of 8 and 5  and 4= 17.

Explanation:
In the above-given question,
given that,
the numbers are 8, 5, and 4.
8 + 5 + 4 = 13.
the sum of 8,  4, and 5 = 17.

Question 4.

Answer:
The sum of 4 and 7  and 3= 14.

Explanation:
In the above-given question,
given that,
the numbers are 4, 7, and 3.
4 + 7 + 3 = 14.
the sum of 4,  7, and 3 = 14.

Question 5.

Answer:
The sum of 8 and 5  and 3= 16.

Explanation:
In the above-given question,
given that,
the numbers are 8, 5, and 3.
8 + 5 + 3 = 16.
the sum of 8,  5, and 3 = 16.

Question 6.

Answer:
The sum of 8 and 5  and 4= 17.

Explanation:
In the above-given question,
given that,
the numbers are 8, 5, and 4.
8 + 5 + 4 = 17.
the sum of 8,  4, and 5 = 17.

THINK SMARTER
Choose a number less than 20. Write the number. Write two ways to make your number.

Question 7.

Answer:
The sum of 10 and 10 = 20.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 10.
10 + 10 = 20.
the sum of 10 and 10 = 20.

Question 8.

Answer:
The sum of 8 and 12 = 20.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 12.
8 + 12 = 20.
the sum of 8 and 12 = 20.

Problem Solving • Applications

GO DEEPER
Write numbers to make each line have the same sum.

Question 9.

Answer:
The number that have the same sum = 8.

Explanation:
In the above-given question,
given that,
the numbers are
3 + 8 + 6 = 17.
5 + 8 + 4 = 17.
17 – 9 = 8.
so the number = 8.

Question 10.

Answer:
The number that have the same sum = 5.

Explanation:
In the above-given question,
given that,
the numbers are
3 + 6 + 6 = 15.
15 – 15 = 0.
15 – 10 = 5.
so the number = 5.

Question 11.
GO DEEPER
Choose a number from 14 to 20 to be the sum. Write numbers to make each line have your sum.
sum for each line ☐

Answer:
The number that have the same sum = 16.

Explanation:
In the above-given question,
given that,
the numbers are
10 + 2 + 4 = 16
10 + 4 + 2 = 16.
10 + 1 + 5 = 16.
so the number = 16.

Question 12.
THINK SMARTER
Choose all the ways that make 13.

Answer:
The sum of 10 and 3 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 3.
10 + 3 = 13.
the sum of 10 and 3 = 13.

TAKE HOME ACTIVITY
• Have your child explain three different ways to make 15. Encourage him or her to use addition and subtraction, including addition of three numbers.

Algebra • Ways to Make Numbers to 20 Homework & practice 5.8

Use . Write ways to make the number at the top.

Question 1.

Answer:
The number is 10.

Explanation:
In the above-given question,
given that,
2 + 7 + 1 = 10.
5 + 5 = 10.
10 – 0 = 10.
9 + 1 = 10.
the number is 10.

Question 2.

Answer:
The number is 13.

Explanation:
In the above-given question,
given that,
8 + 3 + 2 = 13.
7 + 6 = 13.
13 – 0 = 13.
6 + 7 = 13.
the number is 13.

Problem Solving

Write numbers to make 3. each line have the same sum.

Question 3.

Answer:
The number is 16.

Explanation:
In the above-given question,
given that,
5 + 7 + 4 = 16.
6 + 7 + 3 = 16.
7 + 2 + 7 = 16.
the number is 16.

Question 4.
WRITE Math
Use numbers and pictures to show two ways to make the number 12.
____6 + _6___=____12______
____5 ___+_7__=___12_____
___7__+__5___=__12______

Answer:
The sum of 7 and 5 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 5.
7 + 5 = 12.
the sum of 7 and 5 = 12.

Answer:
The sum of 8 and 4 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 4.
8 + 4 = 12.
the sum of 8 and 4 = 12.

Lesson Check

Question 1.
Write ways to make 18.

Answer:
The number is 18.

Explanation:
In the above-given question,
given that,
9 + 8 + 1 = 18.
9 + 9 = 18.
18 – 0 = 18.
10 + 8 = 18
the number is 18.

Question 2.
Write ways to make 9.

Answer:
The number is 9.

Explanation:
In the above-given question,
given that,
3 + 3 + 3 = 9.
6 + 3 = 9.
9 – 0 = 9.
8 + 1 = 9.
the number is 9.

Spiral Review

Question 3.
Write the doubles plus one fact for 7 + 7.
_7_ + _7_ = _14_

Answer:
The sum of 7 and 7 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 7.
7 + 7 = 14.
the sum of 7 and 7 = 14.

Question 4.
Write the doubles minus one fact for 4 + 4.
_4_ + _4_ = _8_

Answer:
The sum of 4 and 4 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 4.
4 + 4 = 8.
the sum of 4 and 4 = 8.

Question 5.
Think of an addition fact to help you subtract.

Answer:
The sum of 9 and 5 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 5.
9 + 5 = 14.
the sum of 9 and 5 = 14.

Answer:
The difference of 14 and 9 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 9.
14 – 9 = 5.
the difference of 14 and 9 = 5.

Lesson 5.9 Algebra • Equal and Not Equal

Essential Question
How can you decide if a number sentence is true or false?

Listen and Draw

Color the cards that make the same number.

Answer:
The cards that make the same number = 7.

Explanation:
In the above-given question,
given that,
the numbers that are the same.
6 + 1 = 7.
3 + 3 +1 = 7.
13 – 6 = 7.
3 + 4 = 7.
4 + 3 = 7.
3 + 2 + 2 = 7.
16 – 9 = 7.
the card that makes the same number = 7.

Math Talk
MATHEMATICAL PRACTICES

Reasoning Why can you use two of the cards you color and an equal sign to make a number sentence?

Model and Draw

The equal sign means that both sides are the same.
Write a number to make each true.

Answer:
The number is 4 + 5 = 5 + 4.

Explanation:
In the above-given question,
given that,
9 = 9.
4 + 5 = 9.
4 + 5 = 5 + 4.
The number is 4 + 5 = 5 + 4.

Share and Show MATH BOARD

Which is true? Circle your answer. Which is false? Cross out your answer.

Question 1.

Question 2.
4 + 1 = 5 + 2
6 – 6 = 7 – 7

Answer:
The number that is true is 6 – 6 = 7 – 7.

Explanation:
In the above-given question,
given that,
the numbers are 4 + 1 = 5.
5 + 2 = 7.
the number that  is true is 6 – 6 = 7 – 7.

Question 3.
7 + 2 = 6 + 3
8 – 2 = 6 + 4

Answer:
The number that is true is 7 + 2 = 6 + 3.

Explanation:
In the above-given question,
given that,
the numbers are
8 – 2 = 6 + 4
the number that  is true is 7 + 2 = 6 + 3.

Question 4.
5 – 4 = 4 – 3
10 = 1 + 0

Answer:
The number that is true is 5 – 4 = 4 – 3.

Explanation:
In the above-given question,
given that,
the numbers are 10 = 1 + 0.
the number that  is true is 5 – 4 = 4 -3.

On Your Own

MATHEMATICAL PRACTICE

Attend to Precision
Which are true? Circle your answers. Which are false? Cross out your answers.

Question 5.

Answer:
The number that is true is 8 + 1 = 2 + 7, 19 = 19.

Explanation:
In the above-given question,
given that,
the numbers are 1 + 9 = 9  – 1.
the number that  is true is 8 + 1 = 2 + 7, 19 = 19.

Question 6.

Answer:
The number that is true is 9 + 7 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 16 – 9 = 9 + 7.
9 – 7 = 7 + 9.
the number that  is true is 9 + 7 = 16.

Question 7.
THINK SMARTER
Lyle writes the false number sentence 2 + 10 = 8. Complete the number sentence to make the sentence true.
2 + _6_ = 8

Answer:
The number that is true is 2 + 6 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 2 + 10 = 8.
the number that  is true is 2 + 6 = 8.

Write numbers to make sentences that are true.

Question 8.
2 + 10 = 7 + _5_

Answer:
The number that is true is 12 = 12.

Explanation:
In the above-given question,
given that,
the numbers are
2 + 10 = 7 + 5.
the number that is true is 12 = 12.

Question 9.
_9_ = 2 + 3 + 4

Answer:
The number that is true is 9 = 9.

Explanation:
In the above-given question,
given that,
the numbers are
9 = 2 + 3 + 4.
the number that is true is 9 = 9..

Question 10.
0 + 9 = _0_ – 9

Answer:
The number that is true is 9 = 9.

Explanation:
In the above-given question,
given that,
the numbers are
9 = 9
the number that is true is 9 = 9.

Question 11.
_6_ + 7 = 7 + 6

Answer:
The number that is true is 13 = 13.

Explanation:
In the above-given question,
given that,
the numbers are
6 + 7 = 7 + 6.
the number that is true is 13 = 13.

Question 12.
THINK SMARTER
Write numbers to show expressions of equal value.
_6_ + _7_ = _7_ + _6_

Answer:
The number that is true is 13 = 13.

Explanation:
In the above-given question,
given that,
the numbers are
6 + 7 = 7 + 6.
the number that is true is 13 = 13.

Problem Solving • Applications

Question 13.
Which are true? Use to color.

Answer:
The number that is true is 20 = 20, 9 + 1 + 1 = 11.

Explanation:
In the above-given question,
given that,
the numbers are
20 = 20, 9 + 1 + 1 = 11, 8 – 0 = 8, 10 + 1 = 1 + 10, 6 = 2 + 2 + 2.
the number that is true is 20 = 20.

Question 14.
THINK SMARTER
Use the same numbers. Write a different number sentence that is true.
7 + 8 = 15

Answer:
The difference of 15 and 7 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 7.
15 – 7 = 8.

Question 15.
THINK SMARTER
Is the math sentence true? Circle Yes or No.

Answer:
The number that is true is 5 – 4 = 9 – 8, 6 + 2 = 2 + 6.

Explanation:
In the above-given question,
given that,
the numbers are
5 – 4 = 9 – 8, 13 = 5 + 7, 6 + 2 = 2 + 6.
the number that is true is 5 – 4 = 9 – 8, 6 + 2 = 2 + 6.

TAKE HOME ACTIVITY
• Write 10 = 7 − 3 and 10 = 7 + 3 on a sheet of paper. Ask your child to explain which is true.

Algebra • Equal and Not Equal Homework & practice 5.9

Which are true? Circle your answers. Which are false? Cross out your answers.

Question 1.
6 + 4 = 5 + 5

Answer:
The number is true.

Explanation:
In the above-given question,
given that,
the numbers are
6 + 4 = 5 + 5.
10 = 10.
The number that is true.

Question 2.
10 = 6 – 4

Answer:
The number is false.

Explanation:
In the above-given question,
given that,
the numbers are
10 = 6 – 4.
10 = 2.
The number that is false.

Question 3.
8 + 8 = 16 – 8

Answer:
The number is false.

Explanation:
In the above-given question,
given that,
the numbers are
8 + 8 = 16 – 8.
16 = 8.
The number that is false.

Question 4.
14 = 1 + 4

Answer:
The number is false.

Explanation:
In the above-given question,
given that,
the numbers are
14 = 1 + 4 .
14 = 5.
The number is false.

Question 5.
8 – 0 = 12 – 4

Answer:
The number is true.

Explanation:
In the above-given question,
given that,
the numbers are
8 – 0 = 12 – 4.
8 = 8.
The number is true.

Question 6.
17 = 9 + 8

Answer:
The number is true.

Explanation:
In the above-given question,
given that,
the numbers are
17 = 9 + 8.
17 = 17.
The number is true.

Problem Solving

Question 7.
Which are true? Use a to color.

Answer:
The number is true.

Explanation:
In the above-given question,
given that,
the numbers are
15 = 15, 3 = 8 – 5, 9 + 2 = 2 + 9, 1 + 2 + 3 = 3 + 3, 13 = 8 + 5.
The number is true.

Question 8.
WRITE Math
Write 5 + ☐ = 6 + 8. Write a number to make the sentence true. Draw a quick picture to explain.

___5 + 9_ = __14____________
____6 + 8 _=__14__________

Answer:
The sum of 5 + 9 = 6 + 8.

Explanation:
In the above-given question,
given that,
5 + 9 = 14.
6 + 8 = 14.
14 = 14.
The sum is 14.

Lesson Check

Question 1.
Circle the number sentences that are true. Cross out the ones that are false.

Answer:
The number is true.

Explanation:
In the above-given question,
given that,
the numbers are
4 + 3 = 9 – 2, 4 + 3 = 6 + 1.
The number is true.

Spiral Review

Question 2.
Use 5, 6 and 11 to write related addition and subtraction sentences.

Answer:
The numbers are 5 + 6 = 11.
6 + 5 = 11.
11 – 6 = 5.
11 – 5 = 6.

Explanation:
In the above-given question,
given that,
the numbers are
5 + 6 = 11.
6 + 5 = 11.
11 – 6 = 5.
11 – 5 = 6.

Question 3.
Solve. Draw or write to show your work. Leah has 4 green toys, 5 pink toys, and 2 blue toys. How many toys does Leah have?
_11_ toys

Answer:
The number of toys does Leah has = 11.

Explanation:
In the above-given question,
given that,
Leah has 4 green toys, 5 pink toys, and 2 blue toys.
4 + 5 + 2 = 11.
The number of toys does Leah has = 11.

Lesson 5.10 Facts Practice to 20

Essential Question
How can addition and subtraction strategies help you find sums and differences?

Listen and Draw
What is 2 + 8?
Use . Draw to show a strategy you can use to solve.

2 + 8 = _10_

Answer:
The sum of 2 and 8 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 2 and 8.
8 + 2 = 10.
the sum of 2 and 8 = 10.

Math Talk
MATHEMATICAL PRACTICES
Explain What other strategy could you use to solve the addition fact?

Share and Show MATH BOARD

Add or subtract.

Question 1.
2 + 5 = _7_

Answer:
The sum of 2 and 5 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 2 and 5.
2 + 5 = 7.
the sum of 2 and 5 = 7.

Question 2.
9 – 6 = _3_

Answer:
The difference of 9 and 6 = 3.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 6.
9 – 6 = 3.
the difference of 9 and 6 = 3.

Question 3.
_12_ = 9 + 3

Answer:
The sum of 9 and 3 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 3.
9 + 3 = 12.
the sum of 9 and 3 = 12.

Question 4
15 – 7 = _8_

Answer:
The difference of 15 and 7 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 7.
15 – 7 = 8.
the difference of 15 and 7 = 8.

Question 5.
3 – 1 = _2_

Answer:
The difference of 3 and 1 = 2.

Explanation:
In the above-given question,
given that,
the numbers are 3 and 1.
3 – 1 = 2.
the difference of 3 and 1 = 2.

Question 6.
_8_ = 2 + 6

Answer:
The sum of 2 and 6 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 2 and 6.
2 + 6 = 8.
the sum of 2 and 6 = 8.

Question 7.
2 + ☐ = 11

Answer:
The sum of 2 and 9 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 2 and 9.
2 + 9 = 11.
the sum of 2 and 9 = 11.

Question 8.
10 – ☐ = 2

Answer:
The difference of 10 and 8 = 2.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 8.
10 – 8 = 2.
the difference of 10 and 8 = 2.

Question 9.
8 = 8 + ☐

Answer:
The sum of 8 and 0 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 0.
8 + 0 = 8.
the sum of 8 and 0 = 8.

Question 10.
12 – 9 = _3_

Answer:
The difference of 12 and 9 = 3.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 9.
12 – 9 = 3.
the difference of 12 and 9 = 3.

Question 11.
12 – 4 = _8_

Answer:
The difference of 12 and 4 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 12 and 4.
12 – 4 = 8.
the difference of 12 and 4 = 8.

Question 12.
_13_ = 4 + 9

Answer:
The sum of 9 and 4 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 4.
9 + 4 = 13.
the sum of 9 and 4 = 13.

Question 13.
☐ + 8 = 13

Answer:
The sum of 8 and 5 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 5.
8 + 5 = 13.
the sum of 8 and 5 = 13.

Question 14.
☐ – 1 = 6

Answer:
The difference of 7 and 1 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 1.
7 – 1 = 6.
the difference of 7 and 1 = 6.

Question 15.
9 = ☐ + 3

Answer:
The sum of 6 and 3 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 3.
6 + 3 = 9.
the sum of 6 and 3 = 9.

Question 16.
16 – 7 = _9_

Answer:
The difference of 16 and 7 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 16 and 7.
16 – 7 = 9.
the difference of 16 and 7 = 9.

Question 17.
11 – 8 = _3_

Answer:
The difference of 11 and 8 = 3.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 8.
11 – 8 = 3.
the difference of 11 and 8 = 3.

Question 18.
_15_ = 8 + 7

Answer:
The sum of 8 and 7 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 7.
8 + 7 = 15.
the sum of 8 and 7 = 15.

On Your Own

MATHEMATICAL PRACTICE
Attend to Precision
Add or subtract.

Question 19.

Answer:
The sum of 6 and 0 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 0.
6 + 0 = 6.
the sum of 6 and 0 = 6.

Question 20.

Answer:
The difference of 17 and 8 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 8.
17 – 8 = 9.
the difference of 17 and 8 = 9.

Question 21.

Answer:
The sum of 4 and 7 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 7.
4 + 7 = 11.
the sum of 4 and 7 = 11.

Question 22.

Answer:
The difference of 9 and 0 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 0.
9 – 0 = 9.
the difference of 9 and 0 = 9.

Question 23.

Answer:
The difference of 17 and 9 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 9.
17 – 9 = 8.
the difference of 11 and 8 = 3.

Question 24.

Answer:
The sum of 4 and 6 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 6.
4 + 6 = 10.
the sum of 4 and 6 = 10.

Question 25.

Answer:
The sum of 3 and 7 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 3 and 7.
3 + 7 = 10.
the sum of 3 and 7 = 10.

Question 26.

Answer:
The difference of 8 and 5 = 3.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 5.
8 – 5 = 3.
the difference of 8 and 5 = 3.

Question 27.

Answer:
The sum of 8 and 3 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 3.
8 + 3 = 11.
the sum of 8 and 3 = 11.

Question 28.

Answer:
The difference of 8 and 6 = 2.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 6.
8 – 6 = 2.
the difference of 8 and 6 = 2.

Question 29.

Answer:
The difference of 10 and 4 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 4.
10 – 4 = 6.
the difference of 10 and 4 = 6.

Question 30.

Answer:
The sum of 9 and 8 = 17.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 8.
9 + 8 = 17.
the sum of 8 and 9 = 17.

Question 31.

Answer:
The sum of 6 and 7 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 7.
6 + 7 = 13.
the sum of 6 and 7 = 13.

Question 32.

Answer:
The difference of 4 and 4 = 0.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 4.
4 – 4 = 0.
the difference of 4 and 4 = 0.

Question 33.

Answer:
The sum of 5 and 6 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 6.
5 + 6 = 11.
the sum of 5 and 6 = 11.

Question 34.

Answer:
The difference of 13 and 6 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 6.
13 – 6 = 7.
the difference of 13 and 6 = 7.

Question 35.

Answer:
The difference of 17 and 9 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 9.
17 – 9 = 8.
the difference of 17 and 9 = 8.

Question 36.

Answer:
The sum of 8 and 8 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 8.
8 + 8 = 16.
the sum of 8 and 8 = 16.

Question 37.

Answer:
The sum of 10 and 5 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 5.
10 + 5 = 15.
the sum of 10 and 5 = 15.

Question 38.

Answer:
The difference of 13 and 3 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 3.
13 – 3 = 10.
the difference of 13 and 3 = 10.

Question 39.

Answer:
The sum of 10 and 3 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 3.
10 + 3 = 13.
the sum of 10 and 3 = 13.

Question 40.

Answer:
The difference of 20 and 10 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 20 and 10.
20 – 10 = 10.
the difference of 20 and 10 = 10.

Question 41.

Answer:
The difference of 10 and 9 = 1.

Explanation:
In the above-given question,
given that,
the numbers are 10 and 9.
10 – 9 = 1.
the difference of 10 and 9 = 1.

Question 42.

Answer:
The sum of 9 and 10 = 19.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 10.
9 + 10 = 19.
the sum of 9 and 10 = 19.

Question 43.
Use the clues to write the addition fact. The sum is 14. One addend is 2 more than the other.

Answer:
The sum of 6 and 8 = 14.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 8.
6 + 8 = 14.
the sum of 6 and 8 = 14.

Problem Solving • Applications

Solve. Write or draw to explain.

Question 44.
There are 14 rabbits. Then 7 rabbits hop away. How many rabbits are there now?
_7_ rabbits

Answer:
The number of rabbits now = 7.

Explanation:
In the above-given question,
given that,
There are 14 rabbits.
Then 7 rabbits hop away.
14 – 7 = 7.
The number of rabbits now = 7.

Question 45.
There are 11 dogs at the park. 2 dogs are gray. The rest are brown. How many dogs are brown?
__9 brown dogs

Answer:
The number of brown dogs = 9.

Explanation:
In the above-given question,
given that,
There are 11 dogs at the park.
2 dogs are gray.
11 – 2 = 9.
The number of brown dogs = 9.

Question 46.
GO DEEPER
Fill in the blanks. Write the addition fact. Solve. There are __ ladybugs on a leaf. Then __ more ladybugs come. How many ladybugs are there now?

Answer:
The number of ladybugs now = 8.

Explanation:
In the above-given question,
given that,
There are 6 ladybugs on a leaf.
Then 2 more ladybugs come.
6 + 2 = 8.
The number of ladybugs now = 8.

Question 47.
THINK SMARTER
Marco has 13 marbles. Lucy has 8 marbles. How many more marbles does Marco have than Lucy? Write or draw to show your work.
_5_ more marbles

Answer:
The number of marbles Marco has = 5.

Explanation:
In the above-given question,
given that,
Marco has 13 marbles.
Lucy has 8 marbles.
13 – 8 = 5.
The number of marbles Marco has = 5.

TAKE HOME ACTIVITY
• Have your child draw a picture to solve 7 + 4. Then have him or her tell a related subtraction fact.

Facts Practice to 20 Homework & Practice 5.10

Add or subtract.

Question 1.

Answer:
The sum of 9 and 4 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 4.
9 + 4 = 13.
the sum of 9 and 4 = 13.

Question 2.

Answer:
The difference of 13 and 6 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 6.
13 – 6 = 7.
the difference of 13 and 6 = 7.

Question 3.

Answer:
The sum of 4 and 5 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 4 and 5.
4 + 5 = 9.
the sum of 4 and 5 = 9.

Question 4.

Answer:
The sum of 7 and 8 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 8.
7 + 8 = 15.
the sum of 7 and 8 = 15.

Question 5.

Answer:
The difference of 11 and 6 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 11 and 6.
11 – 6 = 5.
the difference of 11 and 6 = 5.

Question 6.

Answer:
The difference of 17 and 8 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 17 and 8.
17 – 8 = 9.
the difference of 17 and 8 = 9.

Question 7.

Answer:
The sum of 5 and 7 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 7.
5 + 7 = 12.
the sum of 5 and 7 = 12.

Question 8.

Answer:
The difference of 13 and 5 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 13 and 5.
13 – 5 = 8.
the difference of 13 and 5 = 8.

Question 9.

Answer:
The difference of 16 and 9 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 16 and 9.
16 – 9 = 7.
the difference of 16 and 9 = 7.

Question 10.

Answer:
The sum of 3 and 8 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 3 and 8.
3 + 8 = 11.
the sum of 3 and 8 = 11.

Question 11.

Answer:
The difference of 9 and 8 = 1.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 8.
9 – 8 = 1.
the difference of 9 and 8 = 1.

Question 12.

Answer:
The sum of 7 and 6 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 7.
6 + 7 = 13.
the sum of 6 and 7 = 13.

Question 13.

Answer:
The difference of 9 and 2 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 9 and 2.
9 – 2 = 7.
the difference of 9 and 2 = 7.

Question 14.

Answer:
The sum of 6 and 4 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 4.
6 + 4 = 10.
the sum of 6 and 4 = 10.

Question 15.

Answer:
The difference of 8 and 5 = 3.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 5.
8 – 5 = 3.
the difference of 8 and 5 = 3.

Question 16.

Answer:
The sum of 6 and 6 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 6.
6 + 6 = 12.
the sum of 6 and 6 = 12.

Question 17.

Answer:
The sum of 0 and 9 = 9.

Explanation:
In the above-given question,
given that,
the numbers are 0 and 9.
0 + 9 = 9.
the sum of 0 and 9 = 9.

Question 18.

Answer:
The difference of 15 and 9 = 6.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 9.
15 – 9 = 6.
the difference of 15 and 9 = 6.

Problem Solving

Solve. Draw or write to explain.

Question 19.
Kara has 9 drawings. She gives 4 away. How many drawings does Kara have now?
_5_ drawings

Answer:
The number of drawings kara has = 5.

Explanation:
In the above-given question,
given that,
Kara has 9 drawings.
she gives 4 away.
9 – 4 = 5.
The number of drawings kara has = 5.

Question 20.
WRITE Math
Choose two numbers from 5 to 9. Use your numbers to write an addition sentence. Draw a picture to show your work.
__________________

Answer:
The sum of 6 and 6 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 6.
6 + 6 = 12.
the sum of 6 and 6 = 12.

Lesson Check

Question 1.
Add or subtract.

Answer:
The sum of 8 and 7 = 15.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 7.
8 + 7 = 15.
the sum of 8 and 7 = 15.

Answer:
The sum of 5 and 8 = 13.

Explanation:
In the above-given question,
given that,
the numbers are 5 and 8.
5 + 8 = 13.
the sum of 5 and 8 = 13.

Answer:
The difference of 14 and 7 = 7.

Explanation:
In the above-given question,
given that,
the numbers are 14 and 7.
14 – 7 = 7.
the difference of 14 and 7 = 7.

Answer:
The difference of 15 and 6 = 8.

Explanation:
In the above-given question,
given that,
the numbers are 15 and 6.
15 – 6 = 8.
the difference of 15 and 6 = 8.

Spiral Review

Question 2.
What is the missing number? Write the missing addend.
7 + ☐ = 12

Answer:
The sum of 7 and 5 = 12.

Explanation:
In the above-given question,
given that,
the numbers are 7 and 5.
7 + 5 = 12.
the sum of 5 and 7 = 12.

Question 3.
Greg knows 7 + 4 = 11. What other addition fact does he know that shows the same addends? Write the new fact.
_6_ + _5_ = _11_

Answer:
The sum of 6 and 5 = 11.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 5.
6 + 5 = 11.
the sum of 6 and 5 = 11.

Addition and Subtraction Relationships Chapter 5 Review/Test

Question 1.
There are 2 dogs in the park. Some more dogs come. Now there are 9 in all. How many dogs come?

2 dogs __ come 9 dogs in all

Answer:
The number of dogs comes = 7.

Explanation:
In the above-given question,
given that,
There are 2 dogs in the park.
some more dogs come.
Now there are 9 in all.
2 + 7 = 9.
The number of dogs comes = 7.

Question 2.
Which fact is a related fact?

Answer:
The difference of 8 and 3 = 5.

Explanation:
In the above-given question,
given that,
the numbers are 8 and 3.
8 – 3 = 5.
the difference of 8 and 3 = 5.

Question 3.
Look at the facts. Are they related facts? Choose Yes or No.

Answer:
Yes, the number is a related fact.

Explanation:
In the above-given question,
given that,
the numbers are 14 – 6 = 8.
8 + 6 = 14.
the number is a related fact.

Question 4.
Tom sees 12 bees. Then 7 bees fly away. How many bees does he see now? Write a number sentence to solve. Then write an addition sentence to check.

Answer:
The number of bees now = 5.

Explanation:
In the above-given question,
given that,
Tom sees 12 bees.
Then 7 bees fly away.
12 – 7 = 5.
The number of bees now = 5.

Question 5.
THINK SMARTER
Use to find the unknown numbers. Write the numbers.

6 + _10_ = 16
16 – 6 = _10_

Answer:
The sum of 6 and 10 = 16.

Explanation:
In the above-given question,
given that,
the numbers are 6 and 10.
6 + 10 = 16.
the sum of 6 and 10 = 16.

Answer:
The difference of 16 and 6 = 10.

Explanation:
In the above-given question,
given that,
the numbers are 16 and 6.
16 – 6 = 10.
the difference of 16 and 6 = 10.

Question 6.
Which is the unknown number in these related facts?

Answer:
The unknown number = 9.

Explanation:
In the above-given question,
given that,
the numbers are 9 + 4 = 13.
13 – 4 = 9.
4 + 9 = 13.
13 – 9 = 4.
so the unknown number is 9.

Question 7.
Joe has 7 blue marbles. A friend gives him 6 red marbles. How many marbles does Joe have now? Draw a picture to show your work.
Joe has _13_ marbles.

Answer:
The number of marbles Joe has = 13.

Explanation:
In the above-given question,
given that,
Joe has 7 blue marbles.
A friend gives him 6 red marbles.
7 + 6 = 13.
The number of marbles Joe has = 13.

Question 8.
Choose all the ways that make 12.

Answer:
The numbers are = 4 + 8 and 5 + 5 + 2.

Explanation:
In the above-given question,
given that,
the numbers are
4 + 8 = 12.
5 + 5 + 5 = 12.
The numbers are = 4 + 8 and 5 + 5 + 2.

Question 9.
Is the math sentence true? Choose Yes or No.

Answer:
The numbers are true = 9 = 6 + 3.

Explanation:
In the above-given question,
given that,
The sentences are 7 + 2 = 9 -2.
9 = 6 + 3.
5 + 4 = 4 + 5.
The numbers are true = 9 = 6 + 3.

Question 10.
Ann has 14 white socks. Bill has 6 white socks. How many more white socks does Ann have than Bill? Write or draw to show your work.

_8_ more white socks

Answer:
The number of socks does Ann has than Bill = 8.

Explanation:
In the above-given question,
given that,
Ann has 14 white socks.
Bill has 6 white socks.
The number of socks does Ann has than Bill = 8.

Question 11.
GO DEEPER Alma has 5 crayons. Her dad gives her 7 more crayons. How many crayons does she have now? Use a related fact to
check your answer.
Alma has _12_ crayons.
Write a related fact to check.
_12_ − _7_ = 5

Answer:
The number of crayons Alma has = 12.

Explanation:
In the above-given question,
given that,
Alma has 5 crayons.
Her dad gives her 7 more crayons.
5 + 7 = 12.
The number of crayons Alma has = 12.

Question 12.
Julia buys 12 books. She gives 9 books away. How many books does she have left?

_3_ books left

Answer:
The number of books Julia has left = 3.

Explanation:
In the above-given question,
given that,
Julia buys 12 books.
she gives 9 books away.
12 – 9 = 3.
The number of books Julia has left = 3.