7+7= 34+5= 41+9= 75-30= 10+(99-9)=
18-6= 20-3= 28+6= 53-40= 56-5-10=
50+4= 73+8= 35+9= 6+17= 77-(7+2)=
11-8= 90-30= 84-80= 50-50= 59-30+4=
37-6+20=
60-4-30=
25+5-9=
42+(12-3)=
58+(26-6)=
84-(32+8)=
36-(9-1) 64+20
39+8 22+(3+2)
37-10 52-(8-3)
14+(3+67) 32-4
28-7+ 5
30-6-8
20-(9-8)
22+(15-7)
13-5= 30-9= 2+70= 7+7-6=
36+40= 86-50= 55-5= 63-9+10=
48+2= 8+20= 81+7= 21+5+6=
63-6= 47+6= 72-7= 56-(16-6)=
。
8