0 + 0 = ____           5 + 5 = ____           4 + 4 = ____

 

12 + 1 = ____         6 + 3 = ____           8 + 1 = ____

 

20 + 1 = ____         7 + 3 = ____           8 + 1 = ____

 

20 + 9 = ____         3 + 6 = ____           9 + 9 = ____

 

8 + 10= ____          8 + 4 = ____           7 + 1 = ____

 

2 + 3 = ____           3 + 3 = ____           7 + 5 = ____

 

22 + 1 = ____         2 + 7 = ____           9 + 3 = ____

 

10 + 9 = ____         6+ 6 = ____            3 + 7 = ____

 

3 + 10 = ____         4 + 2 = ____           9 + 2 = ____

 

9 + 9 = ____           8 + 8 = ____           6 + 6 = ____