算24点1,2,4,7

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算24点1,2,4,7

算24点1,2,4,7
算24点1,2,4,7

算24点1,2,4,7
4*(7+1-2)=24
2*(1+4+7)=24

4X(7-2+1)=24
2X(7+4+1)=24

(1-(2-7))*4
((1-2)+7)*4
((1+4)+7)*2
(1+(4+7))*2
((1+7)-2)*4
(1+(7-2))*4
((1+7)+4)*2
(1+(7+4))*2
2*((1+4)+7)
2*(1+(4+7))
2*((1+7)+4)
2*(1+(7+4))
2*((4+1)...

全部展开

(1-(2-7))*4
((1-2)+7)*4
((1+4)+7)*2
(1+(4+7))*2
((1+7)-2)*4
(1+(7-2))*4
((1+7)+4)*2
(1+(7+4))*2
2*((1+4)+7)
2*(1+(4+7))
2*((1+7)+4)
2*(1+(7+4))
2*((4+1)+7)
2*(4+(1+7))
2*((4+7)+1)
2*(4+(7+1))
2*((7+1)+4)
2*(7+(1+4))
2*((7+4)+1)
2*(7+(4+1))
4*(1-(2-7))
4*((1-2)+7)
((4+1)+7)*2
(4+(1+7))*2
4*((1+7)-2)
4*(1+(7-2))
((4+7)+1)*2
(4+(7+1))*2
4*((7+1)-2)
4*(7+(1-2))
4*(7-(2-1))
4*((7-2)+1)
((7+1)-2)*4
(7+(1-2))*4
((7+1)+4)*2
(7+(1+4))*2
(7-(2-1))*4
((7-2)+1)*4
((7+4)+1)*2
(7+(4+1))*2

收起

1: (1 - 2 + 7) × 4
2: ((1 - 2) + 7) × 4
3: (1 - (2 - 7)) × 4
4: (1 + 4 + 7) × 2
5: ((1 + 4) + 7) × 2
6: (1 + (4 + 7)) × 2
7: (1 + 7 - 2) × 4
8: ((1 + 7) - 2) × 4

全部展开

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

收起

2-1=1
7-1=6
4*6=24

1+4+7=12*2=24