Adding 1

Front

2 + 1 =

Back

3

Front

5 + 1 =

Back

6

Front

3 + 1 =

Back

4

Front

1 + 1 =

Back

2

Front

4 + 1 =

Back

5

Front

6 + 1 =

Back

7

Front

8 + 1 =

Back

9

Front

7 + 1 =

Back

8

Front

0 + 1 =

Back

1

Front

9 + 1 =

Back

10