用1、4、7、8这四个数字用+、-、*、/或括号,组成得数是24的算式

用1、4、7、8这四个数字用+、-、*、/或括号,组成得数是24的算式
用1、4、7、8这四个数字用+、-、*、/或括号,组成得数是24的算式

用1、4、7、8这四个数字用+、-、*、/或括号,组成得数是24的算式
(7÷1-4)*8=24

（7-4）*8*1=24

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

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1: (1 + 7) × 4 - 8
2: ((1 + 7) × 4) - 8
3: (1 - 7) × (4 - 8)
4: (1 × 7 - 4) × 8
5: ((1 × 7) - 4) × 8
6: (1 × (7 - 4)) × 8
7: 1 × (7 - 4) × 8
8: 1 × ((7 - 4) × 8)
9: 1 × (8 × (7 - 4))
10: 1 × 8 ×(7 - 4)
11: (1 × 8) × (7 - 4)
12: (4 × (1 + 7)) - 8
13: 4 × (1 + 7) - 8
14: (4 × (7 + 1)) - 8
15: 4 × (7 + 1) - 8
16: (4 - 8) × (1 - 7)
17: 4 × 8 -(1 + 7)
18: (4 × 8) - (1 + 7)
19: 4 × 8 - 1 - 7
20: (4 × 8) - 1 - 7
21: (4 × 8 - 1) - 7
22: ((4 × 8) - 1) - 7
23: 4 × 8 -(7 + 1)
24: (4 × 8) - (7 + 1)
25: 4 × 8 - 7 - 1
26: (4 × 8) - 7 - 1
27: (4 × 8 - 7) - 1
28: ((4 × 8) - 7) - 1
29: (7 + 1) × 4 - 8
30: ((7 + 1) × 4) - 8
31: (7 - 1 × 4) × 8
32: (7 - (1 × 4)) × 8
33: (7 × 1 - 4) × 8
34: ((7 × 1) - 4) × 8
35: (7 ÷ 1 - 4) × 8
36: ((7 ÷ 1) - 4) × 8
37: (7 - 1) × (8 - 4)
38: (7 - 4) × 1 × 8
39: (7 - 4 × 1) × 8
40: ((7 - 4) × 1) × 8
41: (7 - (4 × 1)) × 8
42: (7 - 4) × (1 × 8)
43: (7 - 4) ÷ 1 × 8
44: (7 - 4 ÷ 1) × 8
45: ((7 - 4) ÷ 1) × 8
46: (7 - (4 ÷ 1)) × 8
47: (7 - 4) ÷ (1 ÷ 8)
48: (7 - 4) × 8 × 1
49: ((7 - 4) × 8) × 1
50: (7 - 4) × (8 × 1)
51: (7 - 4) × 8 ÷ 1
52: ((7 - 4) × 8) ÷ 1
53: (7 - 4) × (8 ÷ 1)
54: 8 × (1 × 7 - 4)
55: 8 × ((1 × 7) - 4)
56: 8 × (1 × (7 - 4))
57: 8 × 1 ×(7 - 4)
58: (8 × 1) × (7 - 4)
59: 8 ÷ 1 ×(7 - 4)
60: (8 ÷ 1) × (7 - 4)
61: 8 ÷ (1 ÷ (7 - 4))
62: 8 × 4 -(1 + 7)
63: (8 × 4) - (1 + 7)
64: 8 × 4 - 1 - 7
65: (8 × 4) - 1 - 7
66: (8 × 4 - 1) - 7
67: ((8 × 4) - 1) - 7
68: (8 - 4) × (7 - 1)
69: 8 × 4 -(7 + 1)
70: (8 × 4) - (7 + 1)
71: 8 × 4 - 7 - 1
72: (8 × 4) - 7 - 1
73: (8 × 4 - 7) - 1
74: ((8 × 4) - 7) - 1
75: 8 × (7 - 1 × 4)
76: 8 × (7 - (1 × 4))
77: 8 × (7 × 1 - 4)
78: 8 × ((7 × 1) - 4)
79: 8 × (7 ÷ 1 - 4)
80: 8 × ((7 ÷ 1) - 4)
81: (8 × (7 - 4)) × 1
82: 8 × (7 - 4) × 1
83: 8 × (7 - 4 × 1)
84: 8 × ((7 - 4) × 1)
85: 8 × (7 - (4 × 1))
86: (8 × (7 - 4)) ÷ 1
87: 8 × (7 - 4) ÷ 1
88: 8 × (7 - 4 ÷ 1)
89: 8 × ((7 - 4) ÷ 1)
90: 8 × (7 - (4 ÷ 1))

收起

(8-4)*(7-1)=24,

4*8-7-1=24

有个相当强的人，所以我就不用回答了，呵呵

（8－4）×（7－1）=24
8×（7÷1－4）=24
（7－4）×1×8=24

4乘以8再减去1减去7

4×8-7-1=24