Practice with the help of Spectrum Math Grade 1 Answer Key Chapter 1 Lesson 1.8 Problem Solving regularly and improve your accuracy in solving questions.
Spectrum Math Grade 1 Chapter 1 Lesson 1.8 Problem Solving Answers Key
Solve each problem.
1.
Tom has 5 
Maria has 2
What is the difference? 3
Answer:
Tom has 3 more lorries tham Maria.
Explanation:
Number of lorries Tom has = 5.
Number of lorries Maria has = 2.
Difference:
Number of lorries Tom has – Number of lorries Maria has
= 5 – 2
= 3.
2.
There are 3 
on the ground.
1 more falls to the ground.
What is 3 + 1 ? ______
Answer:
Total number of leaves = 3 + 1 = 4.
Explanation:
Number of leaves on the ground = 3.
Number of leaves falls to the ground = 1.
Total number of leaves = Number of leaves on the ground + Number of leaves falls to the ground
= 3 + 1
= 4.
3.
There are 4 
.
2 drive away.
How many are left? _______
Answer:
Number of cars left = 2.
Explanation:
Number of cars there = 4.
Number of cars drive away = 2.
Number of cars left = Number of cars there – Number of cars drive away
= 4 – 2
= 2.
4.
Fuji has 2 
Steve has 1
What is the sum? _____
Answer:
Total number of dolls they have both = 3.
Sum = 2 + 1 = 3.
Explanation:
Number of dolls Fuji has = 2.
Number of dolls Steve has = 1.
Total number of dolls they have both = Number of dolls Fuji has + Number of dolls Steve has
= 2 + 1
= 3.
5.
There are 2 
.
Then 3 more come.
What is 2 plus 3 ? ____
Answer:
Total number of roosters there = 5.
2 plus 3 = 2 + 3 = 5.
Explanation:
Number of roosters there = 2.
Number of roosters more came = 3.
Total number of roosters there = Number of roosters there + Number of roosters more came
= 2 + 3
= 5.
6.
There are 6 
1 flies away.
What is 6 minus 1 ? _____
Answer:
Number of birds left = 5.
6 minus 1 = 6 – 1 = 5.
Explanation:
Number of birds there = 6.
Number of birds flew away = 1.
Number of birds left = Number of birds there – Number of birds flew away
= 6 – 1
= 5.
Solve each problem.
7. Betsy has 5 
Drew has
Add 5 plus 1. 6
Answer:
Total number of flowers both have = 6.
5 plus 1 = 5 + 1 = 6.
Explanation:
Number of flowers Betsy has = 5.
Number of flowers Drew has = 1.
Total number of flowers both have = Number of flowers Betsy has + Number of flowers Drew has
= 5 + 1
= 6.
8. Eric saw 2 
Esther saw 4
How many in all? _______
Answer:
Total number of houses they both have = 6.
Explanation:
Number of houses Eric saw = 2.
Number of houses Esther saw = 4.
Total number of houses they both have = Number of houses Eric saw + Number of houses Esther saw
= 2 + 4
= 6.
9. The farmer has 3 
The farmer gets 3 more
How many does the farmer have now? ____
Answer:
Total number of goats the farmer has now = 6.
Explanation:
Number of goats the farmer has = 3.
Number of goats the farmer gets more = 3.
Total number of goats the farmer has now = Number of goats the farmer has + Number of goats the farmer gets more
= 3 + 3
= 6.
10. There are 3 
I ate 1
How many are left? ______
Answer:
Number of apples left = 2.
Explanation:
Number of apples there = 3.
Number of apples ate = 1.
Number of apples left = Number of apples there – Number of apples ate
= 3 – 1
= 2.
11. There are 5 
3 
run away.
Subtract 5 – 3. _______
Answer:
Number of giraffes left now = 2.
Explanation:
Number of giraffes there = 5.
Number of giraffes ran away = 3.
Number of giraffes left now = Number of giraffes there – Number of giraffes ran away
= 5 – 3
= 2.
12. There are 6 
I lost 2
How many do I have left? _____
Answer:
Number of balls left = 4.
Explanation:
Number of balls there = 6.
Number of balls lost = 2.
Number of balls left = Number of balls there – Number of balls lost
= 6 – 2
= 4.
Solve each problem.
13. Ella has 1 
Carlos has 1
What is the sum? 2
Answer:
Total number of hats they both have = 2.
Explanation:
Number of hats Ella has = 1.
Number of hats Carlos has = 1.
Total number of hats they both have = Number of hats Ella has + Number of hats Carlos has
= 1 + 1
= 2.
14. I have 1 
.
I buy 4 .
What is 1 plus 4 ? ____
Answer:
Total number of dolls I have now = 5.
Explanation:
Number of dolls I have = 1.
Number of dolls I bought = 4.
Total number of dolls I have now = Number of dolls I have + Number of dolls I bought
= 1 + 4
= 5.
15. Len has 5 
.
Tami has 4 .
What is the difference? _____
Answer:
The difference is 1 coin between Len and Tami.
Explanation:
Number of coins Len has = 5.
Number of coins Tami has = 4.
Difference:
Number of coins Len has – Number of coins Tami has
= 5 – 4
= 1.
16. There are 4 
.
3 fly away.
Subtract 4 minus 3. ____
Answer:
Number of planes left = 1.
Explanation:
Number of planes there = 4.
Number of planes flew away = 3.
Number of planes left = Number of planes there – Number of planes flew away
= 4 – 3
= 1.
17.
Answer:
Total number of oranges they have = 4.
Explanation:
Number of oranges Will picked = 2.
Number of oranges Nita picked = 2.
Total number of oranges they have = Number of oranges Will picked + Number of oranges Nita picked
= 2 + 2
= 4.
18. There are 6 
.
I took 4 .
How many are left? _____
Answer:
Number of pencils left = 2.
Explanation:
Number of pencils there are = 6.
Number of pencils I took = 4.
Number of pencils left = Number of pencils there are – Number of pencils I took
= 6 – 4
= 2.