Write the answers to the addition questions below (the first one is done for you).
7 + 6 = 13
8 + 4 = 12
7 + 5 = 12
6 + 7 = 13
12 + 5 = 17
5 + 9 = 14
6 + 5 = 11
7 + 8 = 15
10 + 5 = 15
9 + 9 = 18
11 + 4 = 15
12 + 3 = 15
13 + 4 = 17
4 + 7 = 11
5 + 8 = 13
3 + 9 = 12
14 + 2 = 16
4 + 9 = 13
9 + 7 = 16
8 + 2 = 10
5 + 5 = 10
7 + 9 = 16
8 + 6 = 14
8 + 7 = 15