15 + 23 =
16 + __ = 24
18 - 9 =
16 - 9 =
17 + 8 =
19 - ___ = 9
18 + 9 =
16 + 8 =
19 + 9 =
15 + __ = 26
24
10
8
28
11
7
38
27
25
9
