Subtraction
Addition
100
___ - 7 = 3
10
100
4 + ___ = 7
3
200
9 - ___ = 3
6
200
12 + ___ = 24
12
300
17 - ___ = 10
7
300
___ + 21 = 32
11
400
__ - 22 = 8
30
400
25 + ___ = 30
5
500
48 - ___ = 13
35
500
__ + 34 = 48
12
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