Subtraction
81-31=
____=56-41
15
64+15=
79
33+27+15
75
75-23=
52
____=108-39
69
33+89
122
35+37+43+25=
140
105-47=
58
179+____=196
17
57+39+13
____-100=33
133
123+_____=175
52
____+27=83
56
88+27+13+22
150
___-100=99
199
____+52=181
129
___+17=93
76
_____-100=51
151
56+24+78+42
200