6 − 1 = ___
10 − 3 = ___
10 − 6 = ___
5 − 5 = ___
5 − 0 = ___
4 − 0 = ___
4 − 4 = ___
6 + ___ = 12
12 − 6 = ___
5 + ___ = 10
10 − 5 = ___
4 + 8 = ___
___ − 4 = 8
6 + 5 = ___
___ − 6 = 5
4 + ___ = 9
9 − ___ = 4
6 + ___ = 14
14 − ___ = 6
___ − 8 = 6 8 + 6 = ___
___ − 6 = 8 6 + 8 = ___
15 − ___ = 7 ___ + 7 = 15
15 − 7 = ___ 7 + ___ = 15