9 − 3 = ___
5 − 2 = ___
1 − 1 = ___
1 − 0 = ___
10 − 0 = ___
10 − 10 = ___
6 + ___ = 12
12 − 6 = ___
7 + ___ = 14
14 − 7 = ___
6 + 5 = ___
___ − 6 = 5
9 + 8 = ___
___ − 9 = 8
6 + ___ = 13
13 − ___ = 6
6 + ___ = 14
14 − ___ = 6
___ − 8 = 5 5 + 8 = ___
___ − 5 = 8 8 + 5 = ___
___ − 8 = 6 8 + 6 = ___
___ − 6 = 8 6 + 8 = ___