(元)
3+8=
11-3=
12-6=
6+9=
12-4=
13-5=
16-8=
7+9=
16-9=
10+8=
12+5=
11-4=
15-6=
9+5=
13-7=
20+11 75-30 55-10 30+30
31 45 60
25+20 80-20 38-7 15+30
27+627-6 14-59 54-951
18-98 3+2730 78-3339
(人)