Subtract:

7 - 1 =

Subtract:

3 - 1 =

Subtract:

4 - 2 =

Subtract:

7 - 2 =

Subtract:

9 - 2 =

Subtract:

6 - 2 =

Subtract:

8 - 2 =

Subtract:

9 - 1 =

Subtract:

6 - 1 =

Subtract:

5 - 1 =

Subtract:

8 - 1 =

Subtract:

5 - 2 =

Subtract:

2 - 1 =

Subtract:

10 - 1 =

Subtract:

4 - 1 =