算24点...................

来源：百度知道 编辑：UC知道 时间：2024/05/30 18:11:33
3 7 1 1
可以调换位子.
要7种...
加油挖..高手们- -|||
（3+1）*（7-1）
(7+1)*3*1
有了

(3+1)*(7-1)
3*(7+1)/1
3*(7+1)*1
3*(7+1*1)
3*(7*1+1)
3*(7/1+1)
3*(7+1/1)

超了一种...

楼上的等于23好伐？
（3+1）*（7-1）

3*7+1+1=24

1: (3 × (7 + 1)) × 1
2: 3 × (7 + 1) × 1
3: 3 × (7 + 1 × 1)
4: 3 × ((7 + 1) × 1)
5: 3 × (7 + (1 × 1))
6: (3 × (7 + 1)) ÷ 1
7: 3 × (7 + 1) ÷ 1
8: 3 × (7 + 1 ÷ 1)
9: 3 × ((7 + 1) ÷ 1)
10: 3 × (7 + (1 ÷ 1))
11: 3 × (7 × 1 + 1)
12: 3 × ((7 × 1) + 1)
13: 3 × (7 ÷ 1 + 1)
14: 3 × ((7 ÷ 1) + 1)
15: (3 + 1) × (7 - 1)
16: (3 × (1 + 7)) × 1
17: 3 × (1 + 7) × 1
18: 3 × (1 + 7 × 1)
19: 3 × ((1 + 7) × 1)
20: 3 × (1 + (7 × 1))
21: (3 × (1 + 7)) ÷ 1
22: 3 × (1 + 7) ÷ 1
23: 3 × (1 + 7 ÷ 1)
24: 3 × ((1 + 7) ÷ 1)
25: 3 × (1 + (7 ÷ 1))
26: 3 × (1 × 7 + 1)
27: 3 × ((1 × 7) + 1)
28: 3 × (1 × (7 + 1))
29: 3 × 1 ×(7 + 1)
30: (3 × 1) × (7 + 1)
31: 3 ÷ 1 ×(