5+8=
4+7=
6+9=
12-10=
8+8=
18-3=
5+7=
6+11=
3+9=
5+9=
12-8=
11-6=
2872 3223 4455
9060 1331 880
15-9 11-2 13-3 16-8 14-7
9 6 7 8 10
14和35