5 + 6 = 11
7 + 8 = 15
6 + 6 = 12
8 + 5 = 13
9 + 2 = 11
4 + 8 = 12
5 + 9 = 14
16 − 8 = 8
14 − 5 = 9
12 − 7 = 5
11 − 6 = 5
12 − 3 = 9
13 − 9 = 4
14 − 7 = 7
7 + 5 = 12
9 + 4 = 13
8 + 8 = 16
7 + 6 = 13
8 + 3 = 11
4 + 7 = 11
7 + 9 = 16
11 − 4 = 7
12 − 6 = 6
13 − 4 = 9
14 − 8 = 6
15 − 7 = 8
18 − 9 = 9
12 − 8 = 4