Doubles - Addition And Subtraction

Front 1

4-2=

Back 1

2

Front 2

6+6=

Back 2

12

Front 3

5+5=

Back 3

10

Front 4

12-6=

Back 4

6

Front 5

16-8=

Back 5

8

Front 6

10-5=

Back 6

5

Front 7

8-4=

Back 7

4

Front 8

2-1=

Back 8

1

Front 9

2+2=

Back 9

4

Front 10

3+3=

Back 10

6

Front 11

18-9=

Back 11

9

Front 12

9+9=

Back 12

18

Front 13

8+8=

Back 13

16

Front 14

0-0=

Back 14

0

Front 15

1+1=

Back 15

2

Front 16

0+0=

Back 16

0

Front 17

4+4=

Back 17

8

Front 18

6-3=

Back 18

3

Front 19

7+7=

Back 19

14

Front 20

14-7=

Back 20

7