6 − 1 = ___
6 − 2 = ___
8 − 3 = ___
5 − 5 = ___
5 − 0 = ___
7 − 0 = ___
7 − 7 = ___
7 + ___ = 14
14 − 7 = ___
4 − 2 = ___
7 + 3 = ___
___ − 7 = 3
8 + 7 = ___
___ − 8 = 7
2 + ___ = 8
8 − ___ = 2
7 + ___ = 12
12 − ___ = 7
12 − ___ = 5 ___ + 5 = 12
12 − 5 = ___ 5 + ___ = 12
___ − 7 = 7 7 + 7 = ___