Addition and Subtraction within 20

Front

12 + 12 = ?

Back

24

Front

3 + ? = 10

Back

7

Front

0 + 0 = ?

Back

0

Front

4 + 9 = ?

Back

13

Front

3 + 4 = ?

Back

7

Front

1 + 1 = ?

Back

2

Front

5 + 5 = ?

Back

10

Front

6 + 3 = ?

Back

9

Front

2 + 2 = ?

Back

4

Front

7 + 2 = ?

Back

9