-1 Subtraction Facts

Front 1

20-1

Back 1

19

Front 2

19-1

Back 2

18

Front 3

18-1

Back 3

17

Front 4

17-1

Back 4

16

Front 5

16-1

Back 5

15

Front 6

15-1

Back 6

14

Front 7

14-1

Back 7

13

Front 8

13-1

Back 8

12

Front 9

12-1

Back 9

11

Front 10

11-1

Back 10

10

Front 11

10-1

Back 11

9

Front 12

9-1

Back 12

8

Front 13

8-1

Back 13

7

Front 14

7-1

Back 14

6

Front 15

6-1

Back 15

5

Front 16

5-1

Back 16

4

Front 17

4-1

Back 17

3

Front 18

3-1

Back 18

2

Front 19

2-1

Back 19

1

Front 20

1-1

Back 20

0