Simple Subtraction

Front 1

5-3=

Back 1

2

Front 2

4-2=

Back 2

2

Front 3

3-1=

Back 3

2

Front 4

6-3=

Back 4

3

Front 5

8-4=

Back 5

4

Front 6

10-2=

Back 6

8

Front 7

2-1=

Back 7

1

Front 8

9-7=

Back 8

2

Front 9

10-9=

Back 9

1

Front 10

8-3=

Back 10

5

Front 11

7-5=

Back 11

2

Front 12

4-3=

Back 12

1

Front 13

9-5=

Back 13

4

Front 14

8-6=

Back 14

2

Front 15

10-1=

Back 15

9