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Name Date

Facts Within 20: Set 1

Add and subtract from memory.

Answer Key

Add

Write each sum.

1.

7 + 2 = 9

2.

6 + 10 = 16

3.

10 + 4 = 14

4.

7 + 8 = 15

5.

5 + 10 = 15

6.

6 + 6 = 12

Subtract

Write each difference.

7.

12 − 5 = 7

8.

13 − 3 = 10

9.

15 − 2 = 13

10.

14 − 8 = 6

11.

11 − 5 = 6

12.

16 − 8 = 8

Missing numbers

Write the missing number.

13.

3 + 7 = 10

14.

18 − 3 = 15

15.

15 − 8 = 7

16.

13 − 8 = 5