Complete the following addition exercises.
3 + 7 = 
2 + 9 = 
4 + 6 = 
5 + 9 = 
12 + 5 = 
6 + 3 = 
8 + 3 = 
10 + 0 = 
9 + 8 = 
1 + 9 = 
7 + 6 = 
9 + 3 = 
6 + 8 = 
0 + 3 = 
3 + 6 = 
7 + 1 = 
4 + 2 = 
4 + 7 = 
11 + 3 = 
7 + 7 = 
9 + 7 = 
12 + 9 =​