Adding on 1 to numbers

Front

9 + 1 =

Back

10

Front

7+1=

Back

8

Front

5+1=

Back

6

Front

8 + 1 =

Back

9

Front

1 + 1 =

Back

2

Front

5 + 1 =

Back

6

Front

2+1=

Back

3

Front

10+1=

Back

11

Front

3+1=

Back

4

Front

4+1=

Back

6