11-3=
15-6=
8+8=
35-20=
12-5=
18-9=
4+20=
66-6=
70+30=
75-50=
30+26=
32+60=
37-30=
10+58=
16+40=
44+5=
45-5-10=
96-40+3=
11-6+53=
45-3+6=
42+5+20=
76-30+3=
(元)
(本)