7+__=20
13
20-__=15
5
2x2=__
4
2/1=__
2
__+82=100
18
50-20=__
30
3x__=9
3
4/2=__
25+__=50
25
50-13=__
37
5x5=__
10/2=__
42+9=__
51
66-44=__
22
12x2=__
24
12/3=__
400
__-42=8
50
__x__=36
6x6
9x4
__/3=5
15
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