9.11.12.12 算24点就是 加减乘除 算24
问题描述：
9.11.12.12 算24点
就是 加减乘除 算24
答
1: 11 × 12 - 9 × 12
2: (11 × 12) - 9 × 12
3: 11 × 12 -(9 × 12)
4: (11 × 12) - (9 × 12)
5: 11 × 12 - 12 × 9
6: (11 × 12) - 12 × 9
7: 11 × 12 -(12 × 9)
8: (11 × 12) - (12 × 9)
9: 12 × 11 - 9 × 12
10: (12 × 11) - 9 × 12
11: 12 × 11 -(9 × 12)
12: (12 × 11) - (9 × 12)
13: 12 × 11 - 12 × 9
14: (12 × 11) - 12 × 9
15: 12 × 11 -(12 × 9)
16: (12 × 11) - (12 × 9)
答
(12-9+12-11)!=24
答
11 × 12 - 9 × 12＝24
答
（11-9）×12=24