Practice with the help of Spectrum Math Grade 1 Answer Key Chapter 1 Lesson 1.21 Problem Solving regularly and improve your accuracy in solving questions.
Spectrum Math Grade 1 Chapter 1 Lesson 1.21 Problem Solving Answers Key
Solve each problem.
1. John has 10⊄.
He buys 
for 3⊄
How much money does he have left? 7 ⊄
Answer:
Amount left with him = 7⊄.
Explanation:
Amount John has = 10⊄.
Amount of cars he buys = 3⊄.
Amount left with him = Amount John has – Amount of cars he buys
= 10⊄ – 3⊄
= 7⊄.
2. Ines buys 
for 6⊄.
She buys 
for 4⊄.
How much money did she spend? ____ ⊄
Answer:
Total amount of toys she buys = 10⊄.
Explanation:
Amount of toys Ines buys = 6⊄.
Amount of toys Ines buys = 4⊄.
Total amount of toys she buys = Amount of toys Ines buys + Amount of toys Ines buys
= 6⊄ + 4⊄
= 10⊄.
3. Jordan has 3⊄.
He finds 5⊄.
How much money does he have? _____ ⊄
Answer:
Amount of money Jordan has now = 8⊄.
Explanation:
Amount of money Jordan has = 3⊄.
Amount of money Jordan finds = 5⊄.
Amount of money Jordan has now = Amount of money Jordan has + Amount of money Jordan finds
= 3⊄ + 5⊄
= 8⊄.
4. Elaine has 9⊄.
She gives 4⊄ to Maxine.
How much money does Elaine have left? _____ ⊄
Answer:
Amount of money Elaine is left with = 5⊄.
Explanation:
Amount of money Elaine has = 9⊄.
Amount of money Elaine gives to Maxine = 4⊄.
Amount of money Elaine is left with = Amount of money Elaine has – Amount of money Elaine gives to Maxine
= 9⊄ – 4⊄
= 5⊄.
5. Victor has 7⊄.
He buys 
for 6⊄.
How much money does he have left? _____ ⊄
Answer:
Amount of money he have left = 1⊄.
Explanation:
Amount of money Victor has = 7⊄.
Amount of money he buys pencils = 6⊄.
Amount of money he have left = Amount of money Victor has – Amount of money he buys pencils
= 7⊄ – 6⊄
= 1⊄.
6. Lin buys 
for 5⊄.
Barb buys 
for 4⊄.
How much money did they spend? _____ ⊄
Answer:
Amount of money did they spend = 9⊄.
Explanation:
Cost of oranges Lin buys = 5⊄.
Cost of apples Lin buys = 4⊄.
Amount of money did they spend = Cost of oranges Lin buys + Cost of apples Lin buys
= 5⊄ + 4⊄
= 9⊄.
Solve each problem.
7. David has 10⊄.
He buys 
for 7⊄.
He has 3⊄ left.
Answer:
Amount of money he has left = 3⊄.
Explanation:
Amount of money David has = 10⊄.
Cost of toys he buys = 7⊄.
Amount of money he has left = Amount of money David has – Cost of toys he buys
= 10⊄ – 7⊄
= 3⊄.
8. Mary buys 
for 3⊄.
She buys 
for 5⊄.
She spent _____ ⊄.
Answer:
Total amount of ballons he buys = 8⊄.
Explanation:
Cost of long balloons Mary buys = 3⊄.
Cost of balloons Mary buys = 5⊄.
Total amount of ballons he buys = Cost of long balloons Mary buys + Cost of balloons Mary buys
= 3⊄ + 5⊄
= 8⊄.
9. Phil buys 
for 6⊄.
He buys 
for 4⊄.
He spent _______ ⊄.
Answer:
Amount of money he spent = 10⊄.
He spent 10⊄.
Explanation:
Number of juices Phil buys = 6⊄.
Number of houses Phil buys = 4⊄.
Amount of money he spent = Number of juices Phil buys + Number of houses Phil buys
= 6⊄ + 4⊄
= 10⊄.
10. Crystal has 6⊄.
Saul has 2⊄.
They have ______ ⊄.
Answer:
Amount of money they have = 8⊄.
They have 8⊄.
Explanation:
Amount of money Crystal has = 6⊄.
Amount of money Saul has = 2⊄.
Amount of money they have = Amount of money Crystal has + Amount of money Saul has
= 6⊄ + 2⊄
= 8⊄.
11. Rita has 8⊄.
She buys 
for 8⊄.
She has ________ ⊄ left.
Answer:
Amount of money Rita has left = 0⊄.
She has 0⊄ left.
Explanation:
Amount of money Rita has = 8⊄.
Cost of the apples she buys = 8⊄.
Amount of money Rita has left = Amount of money Rita has – Cost of the apples she buys
= 8⊄ – 8⊄
= 0⊄.
12. Bob has 2⊄.
Renee has 5⊄.
They have _______ ⊄
Answer:
Amount of money they have = 7⊄.
They have 7⊄.
Explanation:
Amount of Bob has = 2⊄.
Amount of Renee has = 5⊄.
Amount of money they have = Amount of Bob has + Amount of Renee has
= 2⊄ + 5⊄
= 7⊄.