___ - 8 = 6
14
___ - 4 = 16
20
15 - ___ = 9
6
5 + ___ = 12
7
12 + ___ = 19
7
4 + ___ = 13
9
__ + 6 = 9
3
___ + 6 = 13
7
16 - ___ = 9
7
___ - 8 = 7
15
__ - 8 = 12
20
12 + __ = 18
6
17 - __ = 9
8
___ - 3 = 12
15
12 - __ = 4
8
___ + 8 = 17
9