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7+72=
54-3=
37-5+20=
40+50=
90-50=
100-80=
85-5=
80-80=
70+7=
47-5=
4+65=
25+3=
40+50=
16-9=
47-5=
25+9=
17-7=
32+20=
68-50=
4+5=
6+3=
8-5=
17-8=
9-6=
30+= 30-
-4=24
-3=35
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