题文
①18-9
②12-5
③16-8
④13-7
⑤17-8
⑥11-5
⑦11-3
⑧14-7
6
7
8
9
4
5
2
3
⑨11-9
⑩12-8
13-8
12-9
13-9
11-8
12-7
9-7
答案