Practice questions available in **McGraw Hill Math Grade 2 Answer Key PDF Chapter 1 Lesson 3 More Adding and Subtracting Through 20** will engage students and is a great way of informal assessment.

## McGraw-Hill Math Grade 2 Answer Key Chapter 1 Lesson 3 More Adding and Subtracting Through 20

**Add or Subtract**

**Write the sum or difference.**

Question 1.

13 + 7 = __20__

20 – 13 = __7__

Question 2.

9 + 9 = ___

18 – 9 = ___

Answer:

9 + 9 = 18

18 – 9 = 9

Explanation:

I added to tell how many in all

9 + 9 = 18

I subtracted to tell how many are left

18 – 9 = 9.

Question 3.

11 + 3 = ___

14 – 11 = ___

Answer:

11 + 3 = 14

14 – 11 = 3

Explanation:

I added to tell how many in all

11 + 3 = 14

I subtracted to tell how many are left

14 – 11 = 3.

Question 4.

14 + 2 = ___

16 – 14 = ___

Answer:

14 + 2 = 16

16 – 14 = 2

Explanation:

I added to tell how many in all

14 + 2 = 16

I subtracted to tell how many are left

16 – 14 = 2.

Question 5.

3 + 6 = ___

9 – 6 = ___

Answer:

3 + 6 = 9

9 – 6 = 3

Explanation:

I added to tell how many in all

3 + 6 = 9

I subtracted to tell how many are left

9 – 6 = 3.

Question 6.

5 + 5 = ___

10 – 5 = ___

Answer:

5 + 5 = 10

10 – 5 = 5

Explanation:

I added to tell how many in all

5 + 5 = 10

I subtracted to tell how many are left

10 – 5 = 5.