6,9,12,13这四个数怎样排列结果等于24(加减乘除都可以）

（6+9-13）×12
或（12-6）×（13-9）
或 12÷6+9+13

算24，一般想到凑成诸如“2×12,3×8,4×6”的形式，如果不行，再考虑加减法

1: (6 + 9 - 13) × 12
2: ((6 + 9) - 13) × 12
3: (6 + (9 - 13)) × 12
4: (6 - 12) × (9 - 13)
5: (6 - 13 + 9) × 12
6: ((6 - 13) + 9) × 12
7: (6 - (13 - 9)) × 12
8: (9 + 6 - 13) × 12
9: ((9 + 6) - 13) × 12
10: (9 + (6 - 13)) × 12
11: 9 + 12 ÷ 6 + 13
12: (9 + 12 ÷ 6) + 13
13: (9 + (12 ÷ 6)) + 13
14: 9 + (12 ÷ 6) + 13
15: 9 + (12 ÷ 6 + 13)
16: 9 + ((12 ÷ 6) + 13)
17: (9 - 13 + 6) × 12
18: ((9 - 13) + 6) × 12
19: (9 - (13 - 6)) × 12
20: (9 - 13) × (6 - 12)
21: 9 + 13 + 12 ÷ 6
22: (9 + 13) + 12 ÷ 6
23: 9 + (13 + 12 ÷ 6)
24: 9 + (13 + (12 ÷ 6))
25: 9 + 13 +(12 ÷ 6)
26: (9 + 13) + (12 ÷ 6)
27: 12 × (6 + 9 - 13)
28: 12 × ((6 + 9) - 13)
29: 12 × (6 + (9 - 13))
30: 12 ÷ 6 + 9 + 13
31: (12 ÷ 6) + 9 + 13
32: (12 ÷ 6 + 9) + 13
33: ((12 ÷ 6) + 9) + 13
34: 12 ÷ 6 +(9 + 13)
35: (12 ÷ 6) + (9 + 13)
36: (12 - 6) × (13 - 9)
37: 12 × (6 - 13 + 9)
38: 12 × ((6 - 13) + 9)
39: 12 × (6 - (13 - 9))
40: 12 ÷ 6 + 13 + 9
41: (12 ÷ 6) + 13 + 9
42: (12 ÷ 6 + 13) + 9
43: ((12 ÷ 6) + 13) + 9
44: 12 ÷ 6 +(13 + 9)
45: (12 ÷ 6) + (13 + 9)
46: 12 × (9 + 6 - 13)
47: 12 × ((9 + 6) - 13)
48: 12 × (9 + (6 - 13))
49: 12 × (9 - 13 + 6)
50: 12 × ((9 - 13) + 6)
51: 12 × (9 - (13 - 6))
52: 13 + 9 + 12 ÷ 6
53: (13 + 9) + 12 ÷ 6
54: 13 + (9 + 12 ÷ 6)
55: 13 + (9 + (12 ÷ 6))
56: 13 + 9 +(12 ÷ 6)
57: (13 + 9) + (12 ÷ 6)
58: (13 - 9) × (12 - 6)
59: 13 + 12 ÷ 6 + 9
60: (13 + 12 ÷ 6) + 9
61: (13 + (12 ÷ 6)) + 9
62: 13 + (12 ÷ 6) + 9
63: 13 + (12 ÷ 6 + 9)
64: 13 + ((12 ÷ 6) + 9)

12/6+9+13=24;

（12-6）×（13-9）=24

(6+9-13)×12=24