计算24点,3,4,7,11用,加减乘除,小括号得数是24..有几种算法?

1: 3 × (4 - 7 + 11)
2: 3 × ((4 - 7) + 11)
3: 3 × (4 - (7 - 11))
4: 3 × (4 + 11 - 7)
5: 3 × ((4 + 11) - 7)
6: 3 × (4 + (11 - 7))
7: (3 - 11) × (4 - 7)
8: 3 × (11 + 4 - 7)
9: 3 × ((11 + 4) - 7)
10: 3 × (11 + (4 - 7))
11: 3 × (11 - 7 + 4)
12: 3 × ((11 - 7) + 4)
13: 3 × (11 - (7 - 4))
14: 4 ÷ 3 ×(7 + 11)
15: (4 ÷ 3) × (7 + 11)
16: 4 ÷ (3 ÷ (7 + 11))
17: 4 ÷ 3 ×(11 + 7)
18: (4 ÷ 3) × (11 + 7)
19: 4 ÷ (3 ÷ (11 + 7))
20: (4 - 7) × (3 - 11)
21: (4 - 7 + 11) × 3
22: ((4 - 7) + 11) × 3
23: (4 - (7 - 11)) × 3
24: (4 × (7 + 11)) ÷ 3
25: 4 × (7 + 11) ÷ 3
26: 4 × ((7 + 11) ÷ 3)
27: (4 + 11 - 7) × 3
28: ((4 + 11) - 7) × 3
29: (4 + (11 - 7)) × 3
30: (4 × (11 + 7)) ÷ 3
31: 4 × (11 + 7) ÷ 3
32: 4 × ((11 + 7) ÷ 3)
33: (7 - 4) × (11 - 3)
34: (7 + 11) ÷ 3 × 4
35: ((7 + 11) ÷ 3) × 4
36: (7 + 11) ÷ (3 ÷ 4)
37: (7 + 11) × 4 ÷ 3
38: ((7 + 11) × 4) ÷ 3
39: (7 + 11) × (4 ÷ 3)
40: (11 - 3) × (7 - 4)
41: (11 + 4 - 7) × 3
42: ((11 + 4) - 7) × 3
43: (11 + (4 - 7)) × 3
44: (11 + 7) ÷ 3 × 4
45: ((11 + 7) ÷ 3) × 4
46: (11 + 7) ÷ (3 ÷ 4)
47: (11 + 7) × 4 ÷ 3
48: ((11 + 7) × 4) ÷ 3
49: (11 + 7) × (4 ÷ 3)
50: (11 - 7 + 4) × 3
51: ((11 - 7) + 4) × 3
52: (11 - (7 - 4)) × 3

（11－3）×（7－4）

1、 3×（11+4-7）=3×8=24
2、（11-3）×（7-4）=8×3=24
3、（3-11）×（4-7）=（-8）×（-3）=24

（11+7）÷3X4=24