Doubles Plus One

Front 1

2 + 3 =

Back 1

5

Front 2

3 + 2 =

Back 2

5

Front 3

3 + 4 =

Back 3

7

Front 4

4 + 3 =

Back 4

7

Front 5

4 + 5 =

Back 5

9

Front 6

5 + 4 =

Back 6

9

Front 7

5 + 6 =

Back 7

11

Front 8

6 + 5 =

Back 8

11

Front 9

6 + 7 =

Back 9

13

Front 10

7 + 6 =

Back 10

13

Front 11

7 + 8 =

Back 11

15

Front 12

8 + 7 =

Back 12

15

Front 13

8 + 9 =

Back 13

17

Front 14

9 + 8 =

Back 14

17