用加减乘除法将1、2、3、5四个数等于24,要4种方法 1:(5+2+1)*3=24 2:(5-1)*2*3=24

请再帮我想两种,谢谢

第1个回答  2010-08-15
3.[(2+3)*5]-1,
4.(5+3)*(2+1)本回答被提问者采纳
第2个回答  2010-08-15
1: (1 + 2) × (3 + 5)
2: (1 + 2 + 5) × 3
3: ((1 + 2) + 5) × 3
4: (1 + (2 + 5)) × 3
5: (1 + 2) × (5 + 3)
6: (1 + 5 + 2) × 3
7: ((1 + 5) + 2) × 3
8: (1 + (5 + 2)) × 3
9: (2 + 1) × (3 + 5)
10: (2 + 1 + 5) × 3
11: ((2 + 1) + 5) × 3
12: (2 + (1 + 5)) × 3
13: (2 + 1) × (5 + 3)
14: (2 + 3) × 5 - 1
15: ((2 + 3) × 5) - 1
16: 2 × (3 × (5 - 1))
17: 2 × 3 ×(5 - 1)
18: (2 × 3) × (5 - 1)
19: (2 + 5 + 1) × 3
20: ((2 + 5) + 1) × 3
21: (2 + (5 + 1)) × 3
22: (2 × (5 - 1)) × 3
23: 2 × (5 - 1) × 3
24: 2 × ((5 - 1) × 3)
25: 3 × (1 + 2 + 5)
26: 3 × ((1 + 2) + 5)
27: 3 × (1 + (2 + 5))
28: 3 × (1 + 5 + 2)
29: 3 × ((1 + 5) + 2)
30: 3 × (1 + (5 + 2))
31: 3 × (2 + 1 + 5)
32: 3 × ((2 + 1) + 5)
33: 3 × (2 + (1 + 5))
34: (3 + 2) × 5 - 1
35: ((3 + 2) × 5) - 1
36: 3 × (2 + 5 + 1)
37: 3 × ((2 + 5) + 1)
38: 3 × (2 + (5 + 1))
39: 3 × (2 × (5 - 1))
40: 3 × 2 ×(5 - 1)
41: (3 × 2) × (5 - 1)
42: (3 + 5) × (1 + 2)
43: 3 × (5 + 1 + 2)
44: 3 × ((5 + 1) + 2)
45: 3 × (5 + (1 + 2))
46: (3 × (5 - 1)) × 2
47: 3 × (5 - 1) × 2
48: 3 × ((5 - 1) × 2)
49: (3 + 5) × (2 + 1)
50: 3 × (5 + 2 + 1)
51: 3 × ((5 + 2) + 1)
52: 3 × (5 + (2 + 1))
53: (5 + 1 + 2) × 3
54: ((5 + 1) + 2) × 3
55: (5 + (1 + 2)) × 3
56: (5 - 1) × 2 × 3
57: ((5 - 1) × 2) × 3
58: (5 - 1) × (2 × 3)
59: (5 - 1) × 3 × 2
60: ((5 - 1) × 3) × 2
61: (5 - 1) × (3 × 2)
62: (5 + 2 + 1) × 3
63: ((5 + 2) + 1) × 3
64: (5 + (2 + 1)) × 3
65: (5 × (2 + 3)) - 1
66: 5 × (2 + 3) - 1
67: (5 + 3) × (1 + 2)
68: (5 + 3) × (2 + 1)
69: (5 × (3 + 2)) - 1
70: 5 × (3 + 2) - 1
第3个回答  2013-03-05
1+3*6+5=24
1+5+3*6=24
(1+5)*3+6=24
1+5+6*3=24
1+6*3+5=24
3*(1+5)+6=24
3*(5+1)+6=24
3*6+1+5=24
3*6+5+1=24
5+1+3*6=24
(5+1)*3+6=24
5+1+6*3=24
5+3*6+1=24
5+6*3+1=24
6+(1+5)*3=24
6*3+1+5=24
6+3*(1+5)=24
6*3+5+1=24
6+3*(5+1)=24
6+(5+1)*3=24
第4个回答  2010-08-15
(1+2)*(3+5)=24 (2+3)*5-1=24
第5个回答  2010-08-16
(3+5)*(1+2)