All the solutions provided in **McGraw Hill Math Grade 2 Answer Key PDF Chapter 4 Lesson 7 Check Subtraction** will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Answer Key Chapter 4 Lesson 7 Check Subtraction

**Explore and Explain**

**Teacher Directions:** There are 38 vegetables in the garden. Nancy picks 12 vegetables. How many vegetables are left? Show your work. Now check your work. Write the number left in the blue box. Write the number of vegetables picked in the yellow box. Add. What do you notice about the sum?

Explanation:

**See and Show**

You can check the answer to a subtraction problem. Check 25 – 10 = 15.

Subtract

Check by Adding

← If this is the number you subtracted from, your answer is correct.

**Subtract. Check by adding.**

Question 1.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

36 – 20 = 16

20 + 16 = 36

Question 2.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 3.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 4.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

**Talk Math**

Why does addition work as a check for subtraction?

**Helpful Hint**

To check subtraction, add the number you subtracted and the difference.

**On My Own**

**Subtract. Check by adding.**

Question 5.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 6.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 7.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 8.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 9.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 10.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 11.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 12.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

**Problem Solving**

Question 13.

Ima went to the apple orchard with her class. The class picked 48 apples. They ate 17 of them. How many apples are left?

_____ apples

Answer:

31 apples

Explanation:

The class picked 48 apples.

They ate 17 of them.

48 – 17 = 31

31 apples are left

Question 14.

The second grade classes are planting seeds. Roy’s class plants 81 seeds. Jessica’s class plants 66 seeds. How many more seeds does Roy’s class plant than Jessica’s class?

____ seeds

Answer:

15 more seeds

Explanation:

Roy’s class plants 81 seeds.

Jessica’s class plants 66 seeds.

81 – 66 = 15

15 more seeds were Roy’s class plant than Jessica’s class

Question 15.

97 people went sailing yesterday. 38 people went sailing today. How many more people went sailing yesterday than today?

____ people

Answer:

59 people

Explanation:

97 people went sailing yesterday.

38 people went sailing today.

97 – 38 = 59

59 more people went sailing yesterday than today

**write Math** How do you check a subtraction problem?

### McGraw Hill My Math Grade 2 Chapter 4 Lesson 7 My Homework Answer Key

**Practice**

**Subtract. Check by adding.**

Question 1.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 2.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 3.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

Question 4.

Answer:

Explanation:

The difference is added with one subtrahend

To check weather the answer is correct or not

**Solve. Check by adding.**

Question 5.

There are 46 girls skating. There are 67 boys skating. How many more boys than girls are skating?

Answer:

Explanation:

There are 46 girls skating.

There are 67 boys skating.

67 – 46 = 21

21 more boys than girls are skating

Question 6.

Molly checks out 21 books from the library. She returns 12. How many books does Molly still have?

____ books

Answer:

9 books

Explanation:

Molly checks out 21 books from the library.

She returns 12.

21 – 12 = 9

9 books that Molly still have

Question 7.

Reid kicked the football 20 times. He missed a field goal 6 times. How many times did he make a field goal?

____ times

Answer:

14 times

Explanation:

Reid kicked the football 20 times.

He missed a field goal 6 times.

20 – 6 = 14

14 times that he make a field goal

**Test Practice**

Question 8.

Mrs, Levine is 83 years old. Mrs. Smith is 67 years old. How many years older is Mrs. Levine than Mrs. Smith?

(A) 16 years

(B) 20 years

(C) 26 years

(D) 17 years

Answer:

A

Explanation:

Mrs, Levine is 83 years old.

Mrs. Smith is 67 years old.

83 – 67 = 16

16 years older is Mrs. Levine than Mrs. Smith

**Math at Home** Ask your child to find 43 – 16. Then have your child show you how to check the answer.

Explanation:

43 – 16 = 27

27 + 16 = 43