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