4 + 4 = 8                 6 + 6 = 12               5 + 5 = 10

 

10 + 3 = 13             8 + 4 = 12               0 + 2 = 2

 

10 + 2 = 12             2 + 6 = 8                 1 + 1 = 2

 

10 + 5 = 15             5 + 6 = 11               3 + 4 = 7

 

20 + 2 = 22             1 + 0 = 1                 3 + 4 = 7

 

20 + 1 = 21             8 + 8 = 16               5 + 4 = 9

 

20 + 5 = 25             1 + 6 = 7                 3 + 3 = 6

 

9 + 2 = 11               0 + 5 = 5                 2 + 7 = 9

 

30 + 1 = 31             5 + 2 = 7                 6 + 2 = 8

 

10 + 6 = 16             4 + 5 = 9                 7 + 3 = 10