Practice the questions of **McGraw Hill Math Grade 4 Answer Key** **PDF Chapter 2 Lesson 2 Relating Addition and Subtraction** to secure good marks & knowledge in the exams.

## McGraw-Hill Math Grade 4 Answer Key Chapter 2 Lesson 2 Relating Addition and Subtraction

**Add and Subtract
**

**Add or subtract. Check your answer using the inverse operation.**

Question 1.

42 + 39 =

__81__

__81 – 39 = 42__

Answer:

Sum of 42 and 39 we get 81.

Explanation:

42 + 39 = 81.

Check:

=> 81 – 39 = 42.

Question 2.

15 + 10 = ____

Answer:

Sum of 15 and 10 we get 25.

Explanation:

15 + 10 = 25.

Check:

=> 15 = 25 – 10.

Question 3.

8 + 23 = ___

Answer:

Sum of 8 and 23 we get 31.

Explanation:

8 + 23 = 31.

Check:

=> 8 = 31 – 23.

Question 4.

32 + 4 = ___

Answer:

Sum of 32 and 4 we get 36.

Explanation:

32 + 4 = 36.

Check:

=> 32 = 36 – 4.

Question 5.

38 – 12 = ___

Answer:

Difference between 38 and 12 we get 26.

Explanation:

38 – 12 = 26.

Check:

=> 38 = 26 + 12.

Question 6.

29 – 4 = ___

Answer:

Difference between 29 and 4 we get 25.

Explanation:

29 – 4 = 25.

Check:

=> 29 = 25 + 4.

Question 7.

40 – 9 = ____

Answer:

Difference between 40 and 9 we get 31.

Explanation:

40 – 9 = 31.

Check:

=> 40 = 31 + 9.

Question 8.

23 – 11 = ___

Answer:

Difference between 23 and 11 we get 12.

Explanation:

23 – 11 = 12.

Check:

=> 23 = 12 + 11.

Question 9.

Lin read 66 pages of her book on Monday. How many more pages does she need to read to reach 85 pages?

Answer:

Number of pages she needs to read to reach 85 pages = 19.

Explanation:

Number of pages of her book Lin read on Monday = 66.

Number of pages more she need to read till = 85.

Number of pages she needs to read to reach 85 pages = Number of pages more she need to read till – Number of pages of her book Lin read on Monday

= 85 – 66

= 19.