4 − 2 = ___
10 − 1 = ___
3 − 3 = ___
3 − 0 = ___
7 − 0 = ___
7 − 7 = ___
5 + ___ = 10
10 − 5 = ___
9 + 8 = ___
___ − 9 = 8
8 + 7 = ___
___ − 8 = 7
4 + ___ = 11
11 − ___ = 4
6 + ___ = 14
14 − ___ = 6
___ − 8 = 8 8 + 8 = ___
12 − ___ = 5 ___ + 5 = 12
12 − 5 = ___ 5 + ___ = 12