Question

1,2,4,7怎么算成24

Answer 1

(1 + 4 + 7) × 2=24

Answer 2

2 24: (7 + (4 + 1)) × 2 25: 2 × (1 + 7 + 4) 26: 2 × ((1 + 7) + 4) 27: 2 × (1 + (7 + 4)) 28: 2 × (1

Answer 3

【(1 + 4) + 7)】× 2

Answer 4

(7-2+1)*4=24

Answer 5

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