## Go Math Grade 2 Chapter 8 Answer Key Length in Customary Units Concepts

### Length in Customary Units Show What You Know

**Compare Lengths**

Question 1.

Order the pencils from shortest to longest.

Write 1, 2, 3.

Answer:

Explanation:

The yellow color pencil is longest and the green color pencil is shortest pencil.

Use Nonstandard Units to Measure Length

Question 2.

Answer:

Explanation:

There are 6 color tiles that cover the object.Each color tile is 1 inch.So, the object given above is 6 inches long.

Question 3.

Answer:

Explanation:

There are 5 color tiles that cover the object.Each color tile is 1 inch.So, the object given above is 5 inches long.

Measure Length Twice: Nonstandard Units

Question 4.

Answer:

Explanation:

There are 9 push pins that cover the object.So, the length of the given object is 9.

Question 5.

Answer:

Explanation:

There are 23 linking cubes that cover the object.So, the length of the object is 23.

### Length in Customary Units Vocabulary Builder

Visualize It

Fill in the graphic organizer to describe the lengths of different objects.

Understand Vocabulary

Use review words. Complete the sentences.

Question 1.

The blue pencil is the _______ pencil.

Answer:

The blue pencil is the longest pencil

Question 2.

The red pencil is the _______ pencil.

Answer:

The red pencil is the sortest pencil

Question 3.

The red pencil is ______ than the yellow pencil.

Answer:

The red pencil is shorter than the yellow pencil.

Question 4.

The blue pencil is _______ than the yellow pencil.

Answer:

The blue pencil is longer than the yellow pencil.

### Length in Customary Units Game Longer or Shorter?

**Materials**

- Each player chooses a picture on the board and then finds a real object that matches that picture.
- Place the objects next to each other to find which is longer and which is shorter. If the objects are the same length, choose another object.
- Spin the pointer on the spinner. The player with the object that matches the spinner puts a cube on that picture on the board.
- Take turns until all the pictures have cubes. The player with more cubes on the board wins.

### Length in Customary Units Vocabulary Game

Guess the Word

For 3 to 4 players

Materials

- timer

How to Play

- Take turns to play.
- Choose a math word, but do not say it aloud.
- Set the timer for 1 minute.
- Give a one-word clue about your word. Give each player one chance to guess your word.
- If nobody guesses correctly, repeat Step 4 with a different clue. Repeat until a player guesses the word or time runs out. Give a different one-word clue each time.
- The first player to guess the word gets 1 point. If the player can use the word in a sentence, he or she gets 1 more point. Then that player gets the next turn.
- The first player to score 5 points wins.

The Write Way

Reflect

Choose one idea. Write about it in the space below.

- When would you measure the length of an object? When would you estimate its length? Write 2–3 sentences to explain.
- Explain when you would use each measuring tool. measuring tape yardstick inch ruler
- Tell at least two things you know about a line plot.

### Lesson 8.1 Measure with Inch Models

**Essential Question** How can you use inch models to measure length?

______ color tiles

Answer:

6 inches long

Explanation:

The object is 6 color tiles long.

So, the object is 6 inches long.

______ color tiles

Answer:

7 inches long

Explanation:

The object is 7 color tiles long.

So, the object is 7 inches long.

______ color tiles

Answer:

4 inches long

Explanation:

The object is 4 color tiles long.

So, the object is 4 inches long.

**HOME CONNECTION** • Your child used color tiles as an introduction to measurement of length before using standard measurement tools.

**MATHEMATICAL PRACTICES**

Attend to Precision Describe how to use color tiles to measure the length of an object.

Answer:

To measure the length of an object place the color tiles side by side and count the number of tiles that cover the object.Each tile is about 1 inch.Therefore the length of the object will be the total number of tiles.

**Share and Show**

Use color tiles. Measure the length of the object in inches.

Question 1.

about ______ inches

Answer:

Answer:

6 inches long

Explanation:

The object is 6 color tiles long.

So, the object is 6 inches long.

Question 2.

about ______ inches

Answer:

Answer:

9 inches long

Explanation:

The object is 9 color tiles long.

So, the object is 9 inches long.

Question 3.

about ______ inches

Answer:

Answer:

6 inches long

Explanation:

The object is 6 color tiles long.

So, the object is 6 inches long.

Question 4.

about ______ inches

Answer:

Answer:

10 inches long

Explanation:

The object is 10 color tiles long.

So, the object is 10 inches long.

**On Your Own**

Use color tiles. Measure the length of the object in inches.

Question 5.

about ______ inches

Answer:

Answer:

5 inches long

Explanation:

The object is 5 color tiles long.

So, the object is 5 inches long.

Question 6.

about ______ inches

Answer:

Answer:

9 inches long

Explanation:

The object is 9 color tiles long.

So, the object is 9 inches long.

Question 7.

about ______ inches

Answer:

Answer:

13 inches long

Explanation:

The object is 13 color tiles long.

So, the object is 13 inches long.

Question 8.

about ______ inches

Answer:

Answer:

7 inches long

Explanation:

The object is 7 color tiles long.

So, the object is 7 inches long.

Question 9.

about ______ inches

Answer:

Answer:

9 inches long

Explanation:

The object is 9 color tiles long.

So, the object is 9 inches long.

Question 10.

**GO DEEPER**

Blue paper chains are 4 inches long. Red paper chains are 3 inches long. How many are needed to have 10 inches of paper chains?

______ blue paper chain

_______ red paper chains

Answer: 3 paper chains are needed to have 10 inches of paper chains

Explination:

Given there are 4 inches long blue paper chain

And 3 inches long red paper chain

So

we need

1 blue paper chain and = 4 inches

2 red paper chains = 3 inches + 3 inches = 6 inches

That is

4 inches + 3 inches + 3 inches =10 inches

**Problem Solving • Applications**

Question 11.

**THINK SMARTER**

Blue paper chains are 8 inches long. Red paper chains are 6 inches long. How many are needed to have 22 inches of paper chains?

______ blue paper chains

_______ red paper chain

Answer:3 paper chains are needed to have 22 inches of paper chains

Explination:

Given there are 8 inches long blue paper chain

And 6 inches long red paper chain

So

we need

2 blue paper chain and = 8 inches + 8 inches = 16 inches

1 red paper chains = 6 inches

That is

8 inches + 8 inches + 6 inches = 22 inches

Question 12.

**MATHEMATICAL PRACTICE**

Use Reasoning

Liza has a ribbon that is 12 inches long. She needs to cut it into pieces that are each 4 inches long. How many pieces can she make?

______ Pieces

Answer: 3 piecess

Explination:

Given that liza has 12 inches long

Question 13.

**THINK SMARTER +**

Jeremy used color tiles to measure a string. Each tile is 1 inch long. How long is the string? Circle the number in the box to make the sentence true.

Answer:

Explanation:

There are 2 color tiles that cover the length of the string.Each color tile measures 1 inch.So, the string is about 2 inches long.

**TAKE HOME ACTIVITY** • Have your child use several of the same small item (such as paper clips) to measure the lengths of some objects at home.

### Measure with Inch Models Homework & Practice 8.1

Use color tiles. Measure the length of the object in inches.

Question 1.

about ______ inches

Answer:

Answer:

13 inches long

Explanation:

The object is 13 color tiles long.

So, the object is 13 inches long.

Question 2.

about ______ inches

Answer:

Answer:

4 inches long

Explanation:

The object is 4 color tiles long.

So, the object is 4 inches long.

Question 3.

about ______ inches

Answer:

Answer:

8 inches long

Explanation:

The object is 8 color tiles long.

So, the object is 8 inches long.

**Problem Solving**

Question 4.

Look around your classroom. Find an object that is about 4 inches long. Draw and label the object.

Answer:

Explanation:

The pencil i use is 4 inches long.

Question 5.

**WRITE**

Describe how you would find an object that is about 8 inches long.

Answer:

We can find an object that is about 8 inches long by placing color tiles along the object if the is about 8 color tiles then it is about 8 inches long.

**Lesson Check**

Question 1.

Jessie used color tiles to measure the rope. Each color tile measures 1 inch. The rope is about _____ inches long.

Answer:

3 inches long

Explanation:

There are 3 color tiles that cover the lengthe of the rope.Each color tile measures 1 inch. The rope is about 3 inches long.

**Spiral Review**

Question 2.

Adam has these coins. How much money is this?

Answer: 20 cents

Explination:

Given coins are the front and back images of nickel

1 nickel is equal to 5 cents

there are 4 nickel so

5+5+5+5=20 cents

Question 3.

Look at the clock hands. What time does this clock show?

Answer:

Explanation:

The clock has the hours hand on 4 and the minutes hand on the 6 ie 30 mins.So, the time shown in the above watch is 4.30.

Question 4.

Hank has 84 marbles in a bag. His friend Mario has 71 marbles in his bag. How many marbles do they have altogether?

Answer:

Explanation:

Hank has 84 marbles in a bag. His friend Mario has 71 marbles in his bag.Therefore they have 84+71=155 marbles altogether.

### Lesson 8.2 Make and Use a Ruler

**Essential Question** Why is using a ruler similar to using a row of color tiles to measure length?

**Listen and Draw**

Use color tiles. Make the given length. Trace along the edge to show the length.

4 inches

2 inches

3 inches

**HOME CONNECTION** • Your child used color tiles as 1-inch models to show different lengths. This activity helps to make inch units a more familiar concept.

**MATHEMATICAL PRACTICE**

Describe how you knew how many color tiles to use for each length.

Answer:

**Share and Show**

Measure the length with your ruler. Count the inches.

Question 1.

about ______ inches

Answer:

Question 2.

about ______ inches

Answer:

Question 3.

about ______ inches

Answer:

**On Your Own**

Measure the length with your ruler. Count the inches.

Question 4.

about ______ inches

Answer:

Question 5.

about ______ inches

Answer:

Question 6.

about ______ inches

Answer:

Question 7.

about ______ inches

Answer:

Question 8.

about ______ inches

Answer:

**Problem Solving • Applications**

Question 9.

**THINK SMARTER**

Work with a classmate. Use both of your rulers to measure the length of a bulletin board or a window. What is the length?

about _____ inches

Answer:

Question 10.

**MATHEMATICAL PRACTICE**

Explain Describe what you did in Exercise 9. How did you measure a length that is longer than your rulers?

______________________

______________________

Answer:

Measure the length of an object with your ruler. Then, in the space provided, use your ruler to draw

a line equal to the length of the object

Question 11.

**THINK SMARTER**

Measure the length of the yarn with your ruler. Does the sentence describe the yarn. Choose Yes or No.

Answer: 7 inches long

**TAKE HOME ACTIVITY** • Choose one object in this lesson. Have your child find objects that are longer, about the same length, and shorter.

### Make and Use a Ruler Homework & Practice 8.2

Measure the length with your ruler.

Count the inches.

Question 1.

about _____ inches

Answer:

Question 2.

about ______ inches

Answer:

Question 3.

about ______ inches

Answer:

**Problem Solving**

Question 4.

Use your ruler. Measure the width of this page in inches.

about ______ inches

Answer:

Question 5.

**WRITE**

Would you rather use color tiles or your ruler to measure the length of an object? Explain your choice.

Answer:

I would rather use a ruler because you then get the exact measurement using a system.

**Lesson Check**

Question 1.

Use your ruler. What is the length of this ribbon?

about _____ inches

Answer:

**Spiral Review**

Question 2.

What time is shown on this clock?

Answer:

the time is about three hours forty-five minutes

Question 3.

What is the total value of these coins?

_____ cents

Answer:

25 c + 25 c + 10 c we get 60 cents

Question 4.

The first group collected 238 cans. The second group collected 345 cans. How many cans did the two groups collect?

_________

Answer:

Given

The first group collected 238 cans

The second group collected 345 cans.

by adding both group cans

238 + 345 = 583 cans

hence both groups collected 583 cans

Question 5.

There are 2 children in each row. How many children are in 5 rows?

_____ children

Answer:

Given

There are 2 children in each row

hence to find how many children in 5 rows

we need to multiply 2 with 5 rows we get 10 children

### Lesson 8.3 Estimate Lengths in Inches

**Essential Question** How do you estimate the lengths of objects in inches?

**Listen and Draw**

Choose three objects. Measure their lengths with your ruler. Draw the objects and write their lengths.

Answer:

**MATHEMATICAL PRACTICES**

Describe how the three lengths compare. Which is the longest object?

Answer:

The three lengths are compared with ruler lengths

the longest object is a green roller with 13 inches

**Share and Show**

Circle the best estimate for the length of the string.

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

**On Your Own**

Circle the best estimate for the length of the string.

Question 4.

Answer:

Question 5.

Answer:

Question 6.

Answer:

Question 7.

**THINK SMARTER**

Use the 1 -inch mark. Estimate the length of each ribbon.

Answer:

**Problem Solving • Applications**

**MATHEMATICAL PRACTICE**

Analyze Relationships

Question 8.

Sasha has a string that is the length of 5 beads. Each bead is 2 inches long. What is the length of the string?

_______ inches

Answer: 10 inches

Given

Sasha has a string that is the length of 5 beads

Each bead is 2 inches long.

hence by multiplying 2 inches with 5 beads we get 10 inches string

Question 9.

Maurice has a string that is 15 inches long. He has beads that are each 3 inches long. How many beads will fit on the string?

________ beads

Answer: 5 beads

Given,

Maurice has a string that is 15 inches long

beads that are each 3 inches long

by dividing 15 inches with 3 we get 5 beads

Question 10.

**THINK SMARTER**

Tameka has this string. She has many beads that are 1 inch long, like this blue bead. What is the best estimate for the length of the string? Draw more beads on the string to show your estimate.

______ inches

Answer: 5 inches

Given

beads that are 1 inch long,

**TAKE HOME ACTIVITY** • With your child, estimate the lengths in inches of some small objects, such as books.

### Estimate Lengths in Inches Homework & Practice 8.3

The bead is 1 inch long.

Circle the best estimate for the length of the string.

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

**Problem Solving**

Solve. Write or draw to explain.

Question 4.

Ashley has some beads. Each bead is 2 inches long. How many beads will fit on a string that is 8 inches long?

______ beads

Answer:

Given,

Ashley has some beads Each bead is 2 inches long

How many beads will fit on a string that is 8 inches long

hence by dividing 8 inches with 2 beads we get 4 beads

Question 5.

**WRITE**

Describe a way that someone could estimate the length of a book.

Answer:

The best estimation of a book will be in terms of CM(Centimeter) or Feet.

We Should use “Centimeter Scale or Measuring tape” for this purpose.

Otherwise, take a thread, Put one end of the thread on one end of the book, that is along the longer side, and keep elongating the thread until you reach the other end. Now, with the help of a Different kind of Measuring tape, you can find the length of that thread Accurately. And that will be the length of the book.

**Lesson Check**

Question 1.

The bead is 1 inch long. Estimate the length of the string.

______ inches

Answer:

given each bead is 1 inch long

the length of the string is by counting beads we get 5

hence 5 inches

**Spiral Review**

Question 2.

Draw hands on the clock to show 5 minutes after 6.

Answer:

Question 3.

Ella read 16 pages of her book on Monday and 26 pages on Tuesday. There are 64 pages in the book. How many more pages are left for Ella to read?

_______ pages

Answer: 22 pages

Given

Ella read 16 pages of her book on Monday and 26 pages on Tuesday

by adding we get 16 + 26 we get 42 pages

and also given There are 64 pages in the book

so tofind how many left to read

we need to subtract 64 with 42 we get 22 pages

Question 4.

What is the sum?

38 + 24 = _____

Answer: 62

By adding 38 with 24 we get 62

### Lesson 8.4 Measure with an Inch Ruler

**Essential Question** How do you use an inch ruler to measure lengths?

Answer:

To measure the length of an object, place the zero hash mark of the ruler exactly along one end of the object. Align the object you are measuring along the edge of the ruler. Note the hashmark on the ruler along which the other side of the object ends.

**Listen and Draw**

Draw each worm to match the given length.

**MATHEMATICAL PRACTICES**

Use Reasoning Describe how you decided how long to draw the 2-inch and 3-inch worms.

Answer:

**Share and Show**

Measure the length to the nearest inch.

Question 1.

______ inches

Answer:

Question 2.

______ inches

Answer:

Question 3.

______ inches

Answer:

Question 4.

______ inches

Answer:

**On Your Own**

Measure the length to the nearest inch.

Question 5.

______ inches

Answer:

Question 6.

______ inches

Answer:

Question 7.

______ inches

Answer:

Question 8.

______ inches

Answer:

Question 9.

**GO DEEPER**

Measure the lengths to the nearest inch. How much shorter is the ribbon than the yarn?

______ inch shorter

Answer:

2 inch shorter is the ribbon than the yarn

**Problem Solving • Applications**

Question 10.

**THINK SMARTER**

How much longer is the red string than the blue string?

_______ inch longer

Answer:

The red string is 2 inches longer than the blue string

Question 11.

**THINK SMARTER**

If the red and

blue strings were straight and placed end to end, what would the total length be?

______ inches

Answer:

If the red and blue strings were straight and placed end to end the total length be 6 inches

red string is about 4 inches long and blue string is about 2 inches long

Question 12.

**THINK SMARTER**

Mrs. Grant’s pencil is 5 inches long. Is this Mrs. Grant’s pencil? Use an inch ruler to find out. Use the numbers and words on the tiles to make the sentences true.

The pencil is ______ inches long.

This pencil _____ Mrs. Grant’s pencil.

Answer:

The pencil is 5 inches long.

This pencil about 5 inches Mrs. Grant’s pencil.

**TAKE HOME ACTIVITY** • Have your child measure the lengths of some objects to the nearest inch using a ruler or a similar measuring tool.

### Measure with an Inch Ruler Homework & Practice 8.4

Measure the length to the nearest inch.

Question 1.

______ inches

Answer:

Question 2.

______ inches

Answer:

Question 3.

______ inches

Answer:

**Problem Solving**

Question 4.

Measure the string. What is its total length?

_______ inches

Answer:

Question 5.

**WRITE**

Compare the ruler you made to an inch ruler. Describe how they are alike and how they are different.

Answer:

They are different from sizes like inches,feet,centimeters

**Lesson Check**

Question 1.

Use an inch ruler. What is the length to the nearest inch?

_____ inches

Answer:

Question 2.

Use an inch ruler. What is the length to the nearest inch?

______ inches

Answer:

**Spiral Review**

Question 3.

The clock shows the time that Jen got to school. What time did Jen get to school?

Answer:

jen get to school at 8 hours 30 minutes

Question 4.

What is the difference?

13 – 5 = _______

Answer:

by subtracting 13 with 5 we get 8

Question 5.

Each color tile is about 1 inch long. About how long is the ribbon?

Answer:

### Lesson 8.5 Problem Solving • Add and Subtract in Inches

**Essential Question** How can drawing a diagram help when solving problems about length?

There is a paper clip chain that is 16 inches long. Aliyah removes 9 inches of paper clips from the chain. How long is the paper clip chain now?

answer:

Given

There is a paper clip chain that is 16 inches long.

Aliyah removes 9 inches of paper clips from the chain

so by subtracting 16 with 9 we get 7 inches long

**Unlock the Problem**

What information do I need to use?

The chain is _____ inches long. ______ inches of paper clips are removed from the chain.

**Show how to solve the problem**.

The paper clip chain is ___7___ inches long now.

**HOME CONNECTION** • Your child drew a diagram to represent a problem about lengths. The diagram can be used to choose the operation for solving the problem.

**Try Another Problem**

Draw a diagram. Write a number sentence using a ☐ for the missing number. Solve.

Question 1.

Carmen has a string that is 13 inches long and a string that is 8 inches long. How many inches of string does she have?

_________________

Carmen has ________ inches of string.

Answer:

Carmen has 21 inches of string.

Question 2.

Eli has a cube train that is 24 inches long. He removes 9 inches of cubes from the train. How long is Eli’s cube train now?

______________

Eli’s cube train is ______ inches long now.

Answer:

Eli’s cube train is 15 inches long now.

**MATHEMATICAL PRACTICES**

Describe how your diagram shows what happened in the second problem.

Answer:

Eli has a cube train that is 24 inches long. He removes 9 inches of cubes from the train

by subtracting 24 inches with 9 inches we get 15 inches

**Share and Show**

Draw a diagram. Write a number sentence using a ☐ for the missing number. Solve.

Question 3.

Lee has a paper strip chain that is 25 inches long. He unhooks 13 inches from the chain. How long is Lee’s paper strip chain now?

______________

Lee’s paper strip chain is _______ inches long now.

Answer:

Lee’s paper strip chain is 15 inches long now.

Question 4.

**THINK SMARTER**

Sue has two ribbons that have the same length. She has 18 inches of ribbon in all. How long is each ribbon?

_____________

Each ribbon is _______ inches long.

Answer:

Each ribbon is 9 inches long.

**TAKE HOME ACTIVITY** • Have your child explain how he or she used a diagram to solve a problem in this lesson.

### Problem Solving • Add and Subtract in Inches Homework & Practice 8.5

Draw a diagram. Write a number sentence using a ☐ for the missing number. Solve.

Question 1.

Molly had a ribbon that was 23 inches long. She cut 7 inches off the ribbon. How long is her ribbon now?

_______________

Molly’s ribbon is _________ inches long now.

Answer:

Molly’s ribbon is 16 inches long now.

Question 2.

**WRITE**

Describe how you could draw a diagram for a problem about finding the total length for two strings, 15 inches long and 7 inches long

______________________

________________________

Answer:

by adding 15 inches and 7 inches we get 22 inches

**Lesson Check**

Question 1.

Allie has two pieces of string. Each one is 8 inches long. How many inches of string does she have altogether?

_______ inches

Answer:

Given

Allie has two pieces of string. Each one is 8 inches long.

so to find How many inches of the string does she have altogether

we need to add both strings value 8 inches and 8 inches we get 16 inches

Question 2.

Jeff has a cube train that is 26 inches long. He removes 12 inches of cubes from the train. How long is Jeff’s cube train now?

_______ inches

Answer:

Given

Jeff has a cube train that is 26 inches long

He removes 12 inches of cubes from the train

hence to find How long is Jeff’s cube train now

subtract 26 inches with 12 inches we get 14 inches

**Spiral Review**

Question 3.

Ann buys a pencil for 45 cents. Make a list of coins that would equal 45 cents.

__________

Answer:

Ann could have many ways of buying this pencil:

45 pennies

9 nickels

1 quarter and 2 dimes

1 quarter, 1 dime, and 2 nickels

1 quarter, 1 dime, and 10 pennies

3 nickels and 30 pennies

1 dime, 1 nickel, 1 quarter, and 5 pennies

Question 4.

Use an inch ruler. About how long is the string?

about _______ inch

Answer:

Question 5.

Jason has these coins in a jar.

What is the total value of these coins?

$ ______ or _______ cents

Answer:

55 cents

### Length in Customary Units Mid-Chapter Checkpoint

**Concepts and Skills**

Use color tiles. Measure the length of the object in inches.

Question 1.

about _______ inches

Answer: 13 inches

The bead is one inch long. Circle the best estimate for the length of the string.

Question 2.

Answer:

Draw a diagram. Write a number sentence using a ☐ for the missing number. Solve.

Question 3.

A mark is 17 inches long. Katy erases 9 inches from the mark. How long is the mark now?

___________________

The mark is ________ inches long now.

Answer:

The mark is 8 inches long now.

Question 4.

**THINK SMARTER**

Use an inch ruler. What is the length of the string to the nearest inch?

_______ inches

Answer:

### Lesson 8.6 Measure in Inches and Feet

**Essential Question** Why is measuring in feet different from measuring in inches?

answer:

As you can see, one foot is much longer than one inch. We, therefore, use feet to measure bigger objects, such as the height of a door or the length of a car. We can also use feet to measure the distance between things.

When two people stand apart, it would take a lot of inches to measure the distance between them

**Listen and Draw**

Draw or write to describe how you did each measurement.

First Measurement

Second Measurement

**MATHEMATICAL PRACTICES**

Use Reasoning Describe how the length of a sheet of paper and the length of a paper clip are different.

Answer:

**Share and Show**

Measure to the nearest inch.

Then measure to the nearest foot.

Question 1.

______ inches

______ feet

Answer:

2 inches

0.166667 feet

Question 2.

______ inches

______ feet

Answer:

3 inches

0.25 feet

Question 3.

______ inches

______ feet

Answer:

2 inches

0.166667 feet

**On Your Own**

Measure to the nearest inch.

Then measure to the nearest foot.

Question 4.

______ inches

______ feet

Answer:

4 inches

0.333333 feet

Question 5.

______ inches

______ feet

Answer:

3 inches

0.25 feet

Question 6.

______ inches

______ feet

Answer:

4 inches

0.333333 feet

Question 7.

______ inches

______ feet

Answer:

3 inches

0.25 feet

Question 8.

______ inches

______ feet

Answer:

3 inches

0.25 feet

**Problem Solving • Applications**

Question 9.

**THINK SMARTER**

Estimate the length of a real shelf in inches and in feet. Then measure.

Answer:

Question 10.

**MATHEMATICAL PRACTICE** Explain

Look at your measurements for the shelf. Why is the number of inches different from the number of feet?

________________

__________________

Answer:

inches Used to measure smaller objects and materials

Feet Used to measure larger objects and materials

Question 11.

**THINK SMARTER**

Use the words on the tiles that make the sentence true.

A book shelf is 4 ______ long.

Deb’s necklace is 20 ______ long.

A marker is 3 _______ long.

Jim’s bicycle is 4 _____ long.

Answer:

A book shelf is 4 feet long.

Deb’s necklace is 20 inches long.

A marker is 3 inches long.

Jim’s bicycle is 4 feet long.

**TAKE HOME ACTIVITY** • Have your child measure the distance of a few footsteps in inches and then in feet.

### Measure in Inches and Feet Homework & Practice 8.6

Measure to the nearest inch.

Then measure to the nearest foot.

Question 1.

bookcase

______ inches

______ feet

Answer:

2 inches

0.166667 feet

Question 2.

window

______ inches

______ feet

Answer:

2 inches

0.166667 feet

**Problem Solving**

Question 3.

Jake has a piece of yarn that is 4 feet long. Blair has a piece of yarn that is 4 inches long. Who has the longer piece of yarn? Explain.

___________________

_____________________

Answer:

Given

Jake has a piece of yarn that is 4 feet long. Blair has a piece of yarn that is 4 inches long.

Since a foot is longer than an inch, this means the answer would be greater than

Question 4.

**WRITE**

Would you measure the length of a jump rope in inches or in feet? Explain your choice.

Answer:

To get a more accurate measurement you would measure it by inches.

**Lesson Check**

Question 1.

Larry is telling his sister about using a ruler to measure length. Fill in the blanks with ‘inch’ or ‘foot’ to make the sentence true.

I ______ is longer than I ______.

Answer:

I foot is longer than I inch.

**Spiral Review**

Question 2.

Matt put this money in his pocket. What is the total value of this money?

$ ______

Answer:

1 dollar

10 cents

1 cent

by adding we get one dollar 11 cents

Question 3.

What time is shown on this clock?

Answer:

one hour 50 minutes

Question 4.

Ali had 38 game cards. Her friend gave her 15 more game cards. How many game cards does Ali have now?

_____ cards

Answer:

Given

Ali had 38 game cards. Her friend gave her 15 more game cards

to find How many game cards does Ali have now

by adding 38 and 15 we get 53 game cards

### Lesson 8.7 Estimate Lengths in Feet

**Essential Question** How do you estimate the lengths of objects in feet?

Look for 3 classroom objects that are about the same length as a 12-inch ruler. Draw and label the objects.

**MATHEMATICAL PRACTICE**

Which objects have a greater length than the ruler? Explain.

Answer:

the teachers desk is greater than the other objects

**Model and Draw**

Estimate how many 12-inch rulers will be about the same length as this bulletin board.

_______ rulers, or ______ feet

**Share and Show**

Find each object. Estimate how many 12-inch rulers will be about the same length as the object.

Question 1.

bookshelf

Estimate: ______ rulers, or ______ feet

Answer:

Estimate: 3 rulers, or 3 feet

12-inch rulers

Question 2.

chair

Estimate: ______ rulers, or ______ feet

Answer:

Estimate: 2 rulers, or 2 feet

**On Your Own**

Find each object. Estimate how many 12-inch rulers will be about the same length as the object.

Question 3.

desktop

Estimate: ______ rulers, or ______ feet

Answer:

Estimate: 3 rulers, or 3 feet

Question 4.

wall map

Estimate: ______ rulers, or ______ feet

Answer:

Estimate: 5 rulers, or 5 feet

Question 5.

window

Estimate: ______ rulers, or ______ feet

Answer:

Estimate: 2 rulers, or 2 feet

Question 6.

teacher’s desk

Estimate: ______ rulers, or ______ feet

Answer:

Estimate: 4 rulers, or 4 feet

**Problem Solving • Applications**

Question 7.

**THINK SMARTER**

Estimate the distance from your desk to the door in feet. Then estimate the same distance in inches.

______ feet

_______ inches

Answer:

5 feet

60 inches

Explain how you made your estimates for the number of feet and for the number of inches.

___________________

___________________

Answer:

estimates for the number of feet and for the number of inches by taking ruler we can find the ruler in inches

Question 8.

**THINK SMARTER**

Match the object with the estimate of its length in feet.

Answer:

**TAKE HOME ACTIVITY** • With your child, estimate the lengths of some objects in feet.

### Estimate Lengths in Feet Homework & Practice 8.7

Find each object.

Estimate how many 12-inch rulers will be about the same length as the object.

Question 1.

door

Estimate: ______ rulers, or _____ feet

Answer:

Estimate: 7 rulers, or 7 feet

Question 2.

flag

Estimate: ______ rulers, or _____ feet

Answer:

Estimate: 3 rulers, or 3 feet

**Problem Solving**

Solve. Write or draw to explain.

Question 3.

Mr. and Mrs. Baker place 12-inch rulers along the length of a rug. They each line up 3 rulers along the edge of the rug. What is the length of the rug?

about ______ feet

Answer:

Given

Mr. and Mrs. Baker place 12-inch rulers along the length of a rug. They each line up 3 rulers along the edge of the rug

to find the length of the rug by each ruler equal to 1 feet

so there are 3 rulers we get 3 feet

about 3 feet

Question 4.

**WRITE**

Choose an object that is a few feet long. Explain how to estimate its length in feet.

___________________

___________________

Answer:

the length of the object is 4 feets

**Lesson Check**

Question 1.

Estimate how many 12 inch rulers will be about the same length as a bike.

_____ rulers, or ______ feet

Answer:

6 rulers, or 6 feet

Question 2.

Estimate how many 12 inch rulers will be about the same length as a keyboard.

_______ rulers, or _____ feet

Answer:

2 rulers, or 2 feet

**Spiral Review**

Question 3.

What is the total value of 2 quarters, 3 dimes, and 4 nickels?

$ ______

Answer:

2*25=50

3*10=30

4*5=20

50+30+20=100

$ 1

Question 4.

What is the total value of 2 dimes, 3 nickels, and 2 pennies?

$ _____ or _____ cents

Answer:

2 dimes * 10 = 20

3 nickels * 5 = 15

2 pennies * 1 = 2

by adding we get 20+15+2 = 37 cents

Question 5.

There are 68 children in the school. There are 19 children on the playground. How many more children are in the school than on the playground?

_______ children

Answer:

Given

There are 68 children in the school. There are 19 children on the playground

to find How many more children are in the school than on the playground

we need to subtract 68 with 19 we get 49 children

Question 6.

What is the sum?

Answer:

By adding 548 with 436 we get 984

### Lesson 8.8 Choose a Tool

**Essential Question** How do you choose a measuring tool to use when measuring lengths?

**Listen and Draw**

Draw or write to describe how you measured the distances with the yarn.

Distance 1

Distance 2

**MATHEMATICAL PRACTICES**

Which distance was longer? Explain how you know.

Answer:

Distance 1 is longer than distance 2

by observing the length we get to know the distance

**Share and Show**

Choose the best tool for measuring the real object.

Then measure and record the length or distance.

Question 1.

the length of a book

Tool : ________

Length : __________

Answer:

Tool : inch ruler

Length : 4 inch

Question 2.

the distance around a cup

Tool : ________

Length : __________

Answer:

Tool : measuring tape

Length : about 3 inches

**On Your Own**

Choose the best tool for measuring the real object.

Then measure and record the length or distance.

Question 3.

the length of a chalkboard

Tool : ________

Length : __________

Answer:

Tool : inch ruler

Length : 3 inches

Question 4.

the length of a marker

Tool : ________

Length : __________

Answer:

Tool : inch ruler

Length : 4 inches

Question 5.

the distance around a globe

Tool : ________

Length : __________

Answer:

Tool : measuring tape

Length : about 3 inches

Question 6.

the length of a classroom wall

Tool : ________

Length : __________

Answer:

Tool : Yard stick

Length : 3 yards

**Problem Solving • Applications**

Question 7.

**THINK SMARTER**

Rachel wants to measure the length of a sidewalk. Should she use an inch ruler or a yardstick? Explain.

Rachel should use _______ because

___________________

Answer:

Rachel should use yard stick because

the length which is longer need to be measured by the yard stick to get the better results

Question 8.

**MATHEMATICAL PRACTICE** Apply

What is an object that you would measure with a measuring tape? Explain why you would use this tool.

________________________

________________________

Answer:

we should use this measuring tape to get the accurate results

Question 9.

**THINK SMARTER+**

Jim measures the length of a picnic table with an inch ruler. Is Jim using the best tool for measuring? Explain.

_________________________

________________________

Answer:

we should use this measuring tape to get the accurate results

**TAKE HOME ACTIVITY** • Have your child name some objects that he or she would measure using a yardstick.

### Choose a Tool Homework & Practice 8.8

Choose the best tool for measuring the real object. Then measure and record the length or distance.

Question 1.

the length of your desk

Tool : _____________

Length : ___________

Answer:

Tool : inch ruler

Length : 2 feets

Question 2.

the distance around a basket

Tool : _____________

Length : ___________

Answer:

Tool : measuring tape

Length : 2 feets

**Problem Solving**

Choose the better tool for measuring.

Explain your choice.

Question 3.

Mark wants to measure the length of his room. Should he use an inch ruler or a yardstick?

Mark should use ________ because

______________________

Answer:

Mark wants to measure the length of his room.

Mark should use yardstick because to get accurate measurements

Question 4.

**WRITE**

Describe how you would use a yardstick to measure the length of a rug.

Answer:

Measure the rug by putting the yardstick on each side of the rug to see the length

**Lesson Check**

Question 1.

Kim wants to measure the distance around her bike tire. Circle the best tool for her to use.

Answer:

Question 2.

Ben wants to measure the length of a seesaw. Circle the best tool for him to use.

Answer:

**Spiral Review**

Question 3.

Estimate how many 12 inch rulers will be about the same length as a sheet of paper.

______ ruler, or _____ foot

Answer:

1 ruler, or 1 foot

Question 4.

Andy has a rope that is 24 inches long. He cuts off 7 inches from the rope. How long is the rope now?

_____ inches

Answer:

Given

Andy has a rope that is 24 inches long.

He cuts off 7 inches from the rope

by subtracting 24 with 7 we get 17

Question 5.

Jan is telling her friend about using a ruler to measure length. Fill in the blanks with inches or foot to make the sentence true.

12 ______ is the same length as 1 _______.

Answer:

12 inches is the same length as 1 feet.

### Lesson 8.9 Display Measurement Data

**Essential Question** How can a line plot be used to show measurement data?

**Listen and Draw**

Use an inch ruler. Measure and record each length.

______ inches

Answer:

______ inches

Answer:

______ inches

Answer:

**HOME CONNECTION** • Your child practiced measuring different lengths in inches in preparation for collecting measurement data in this lesson.

**MATHEMATICAL PRACTICES**

Describe how the lengths of the three strings are different.

Answer:

the lengths of the three strings are different.

because the length of the strings are 7 inches 3 inch and 5 inches

**Share and Show**

Question 1.

Use an inch ruler. Measure and record the lengths of 5 books in inches.

Answer:

Question 2.

Write a title for the line plot. Then write the numbers and draw the Xs.

Answer:

**On Your Own**

Question 3.

Use an inch ruler. Measure and record the lengths of 5 pencils in inches.

Answer:

Question 4.

Write a title for the line plot. Then write the numbers and draw the Xs.

Answer:

Question 5.

Use an inch ruler. Measure and record the lengths of 4 crayons in inches. Then complete the line plot.

Answer:

**Problem Solving • Applications**

Question 6.

THINK SMARTER

Use the data in the list to complete the line plot.

Answer:

Question 7.

**THINK SMARTER**

Sarah made a line plot to show the data about the length of leaves. Is Sarah’s line plot correct? Tell why or why not.

________________________

_________________________

Answer:

**TAKE HOME ACTIVITY** • Have your child describe how to make a line plot.

### Display Measurement Data Homework & Practice 8.9

Question 1.

Use an inch ruler. Measure and record the lengths of 4 different books in inches.

Answer:

Question 2.

Make a line plot of the information above. Write a title for a line plot. Then write the numbers and draw the Xs.

Answer:

**Problem Solving**

Question 3.

Jesse measured the lengths of some strings. Use his list to complete the line plot.

Answer:

Question 4.

**WRITE**

Describe how you made a line plot in this lesson.

Answer:

**Lesson Check**

Question 1.

Use the line plot. How many sticks are 4 inches long?

______ sticks

Answer:

**Spiral Review**

Question 2.

Kim wants to measure a ball. Circle the best tool for Kim

Answer:

Question 3.

Estimate how many 12 inch rulers will be about the same length as a teacher’s desk.

_____ rulers, or _____ feet

Answer:

Question 4.

Kurt has a string that is 12 inches long and another string that is 5 inches long. How many inches of string does he have altogether?

_______ inches

Answer:

Question 5.

One box has 147 books. The other box has 216 books. How many books are there in both boxes?

_______ books

Answer:

### Length in Customary Units Review/Test

Question 1.

**THINK SMARTER**

Josh wants to measures the distance around a soccer ball.

Circle the best choice of tool.

inch ruler

yardstick

measuring tape

Explain your choice of tool.

Answer:

Question 2.

**GO DEEPER**

Luke has a string that is 6 inches long and a string that is 11 inches long. How many inches of string does Luke have?

Draw a diagram. Write a number sentence using a ☐ for the missing number. Solve.

Luke has ______ inches of string.

Answer:

Question 3.

Use an inch ruler. What is the length of the lip balm to the nearest inch?

Circle the number in the box to make the sentence true.

Answer:

Question 4.

Tom uses tiles to measure a string. Each tile is 1 inch long. Tom says the string is 3 inches long. Is he correct? Explain.

___________________

___________________

Answer:

Question 5.

Dalia made a line plot to show the lengths of her ribbons. How many ribbons are shown in the line plot?

The line plot shows ______ ribbons.

Suppose Dalia cut one of the ribbons that is 6 inches long into two pieces that are each 3 inches long. Explain how she should change the line plot.

_________________

_________________

Answer:

Question 6.

Use the words on the tiles to make the sentence true.

The table is 3 ______ long.

The belt is 30 ______ long.

The hallway is 15 ______ long.

Answer:

Question 7.

Use the 1-inch mark. Estimate the length of each object.

Answer:

Question 8.

Use an inch ruler. What is the length of the paper clip to the nearest inch?

______ inches

Answer:

Question 9.

Estimate how many 12-inch rulers will be about the same height as a classroom door. Does the sentence describe the door? Choose Yes or No.

What is your estimate of how wide the door is?

Answer: 8 feet height