15 - 7 =
6 + 6 =
8 + 8 =
12 + 8 =
12 - 6 =
9 + 9 =
17 + 7 =
22 + 4 =
29 - 7 =
20 + 10 =
7 + 7 =
27 - 6 =
14
6
26
22
20
16
8
18
30
21
24
12
