doubles addition facts

Front

3 + 3 = ?

Back

6

Front

9 + 9 = ?

Back

18

Front

4 + 4 = ?

Back

8

Front

5 + 5 = ?

Back

10

Front

2 + 2 = ?

Back

4

Front

6 + 6 = ?

Back

12

Front

7 + 7 = ?

Back

14

Front

8 + 8 = ?

Back

16

Front

1 + 1 = ?

Back

2

Front

10 + 10 = ?

Back

20