9 − 3 = ___
5 − 2 = ___
9 − 9 = ___
9 − 0 = ___
6 − 6 = ___
6 − 0 = ___
4 + ___ = 8
8 − 4 = ___
8 + ___ = 16
16 − 8 = ___
9 + 5 = ___
___ − 9 = 5
4 + 6 = ___
___ − 4 = 6
6 + ___ = 13
13 − ___ = 6
6 + ___ = 14
14 − ___ = 6
15 − ___ = 7 ___ + 7 = 15
15 − 7 = ___ 7 + ___ = 15
12 − ___ = 5 ___ + 5 = 12
12 − 5 = ___ 5 + ___ = 12