18+5=
11-7=
14+3=
5+7=
19-0=
14-7=
0+7=
12+7=
18-( )= 10
( )+4=17
7+( )=13
15-716-8 13-510+4 7887 6859
78-8= 45-40= 13-8= 66-60+5=
13-7= 40+18= 17-9= 31+6=
6+52= 81-20= 23+56= 30+70=
27-9= 38+6= 64+8= 66+7=
38+40= 62-50= 7+53= 62-6=
3+89= 67+5= 9+35= 8+45=
42-4= 25+17= 60-3= 80-5=
38-7= 72+9= 5+46= 30-8=
80
70
20
25
30
45