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.

Question 1.
42 + 39 = 81
81 – 39 = 42
Sum of 42 and 39 we get 81.

Explanation:
42 + 39 = 81.
Check:
=> 81 – 39 = 42.

Question 2.
15 + 10 = ____
Sum of 15 and 10 we get 25.

Explanation:
15 + 10 = 25.
Check:
=> 15 = 25 – 10.

Question 3.
8 + 23 = ___
Sum of 8 and 23 we get 31.

Explanation:
8 + 23 = 31.
Check:
=> 8 = 31 – 23.

Question 4.
32 + 4 = ___
Sum of 32 and 4 we get 36.

Explanation:
32 + 4 = 36.
Check:
=> 32 = 36 – 4.

Question 5.
38 – 12 = ___
Difference between 38 and 12 we get 26.

Explanation:
38 – 12 = 26.
Check:
=> 38 = 26 + 12.

Question 6.
29 – 4 = ___
Difference between 29 and 4 we get 25.

Explanation:
29 – 4 = 25.
Check:
=> 29 = 25 + 4.

Question 7.
40 – 9 = ____
Difference between 40 and 9 we get 31.

Explanation:
40 – 9 = 31.
Check:
=> 40 = 31 + 9.

Question 8.
23 – 11 = ___
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?