Question

（7.6.9.11）（8.5.4.2）用加减乘除的方法，使结果为24.每个数字只能用一次

Answer 1

1: (8 - 5) × 4 × 2
2: ((8 - 5) × 4) × 2
3: (8 - 5) × (4 × 2)
4: 8 × (5 - 4 + 2)
5: 8 × ((5 - 4) + 2)
6: 8 × (5 - (4 - 2))
7: 8 × (5 - 4 ÷ 2)
8: 8 × (5 - (4 ÷ 2))
9: (8 - 5) × 2 × 4
10: ((8 - 5) × 2) × 4
11: (8 - 5) × (2 × 4)
12: 8 × (5 + 2 - 4)
13: 8 × ((5 + 2) - 4)
14: 8 × (5 + (2 - 4))
15: 8 × 5 ÷ 2 + 4
16: (8 × 5) ÷ 2 + 4
17: (8 × 5 ÷ 2) + 4
18: ((8 × 5) ÷ 2) + 4
19: (8 × (5 ÷ 2)) + 4
20: 8 × (5 ÷ 2) + 4
21: 8 × (4 × 2 - 5)
22: 8 × ((4 × 2) - 5)
23: 8 × (2 + 5 - 4)
24: 8 × ((2 + 5) - 4)
25: 8 × (2 + (5 - 4))
26: 8 ÷ 2 + 5 × 4
27: (8 ÷ 2) + 5 × 4
28: 8 ÷ 2 +(5 × 4)
29: (8 ÷ 2) + (5 × 4)
30: 8 ÷ 2 × 5 + 4
31: (8 ÷ 2) × 5 + 4
32: (8 ÷ 2 × 5) + 4
33: ((8 ÷ 2) × 5) + 4
34: (8 ÷ (2 ÷ 5)) + 4
35: 8 ÷ (2 ÷ 5) + 4
36: 8 × (2 - 4 + 5)
37: 8 × ((2 - 4) + 5)
38: 8 × (2 - (4 - 5))
39: 8 × (2 × 4 - 5)
40: 8 × ((2 × 4) - 5)
41: 8 ÷ 2 + 4 × 5
42: (8 ÷ 2) + 4 × 5
43: 8 ÷ 2 +(4 × 5)
44: (8 ÷ 2) + (4 × 5)
45: 5 × 8 ÷ 2 + 4
46: (5 × 8) ÷ 2 + 4
47: (5 × 8 ÷ 2) + 4
48: ((5 × 8) ÷ 2) + 4
49: (5 × (8 ÷ 2)) + 4
50: 5 × (8 ÷ 2) + 4
51: 5 × 4 + 8 ÷ 2
52: (5 × 4) + 8 ÷ 2
53: 5 × 4 +(8 ÷ 2)
54: (5 × 4) + (8 ÷ 2)
55: (5 × 4 - 8) × 2
56: ((5 × 4) - 8) × 2
57: (5 - 4 + 2) × 8
58: ((5 - 4) + 2) × 8
59: (5 - (4 - 2)) × 8
60: (5 - 4 ÷ 2) × 8
61: (5 - (4 ÷ 2)) × 8
62: 5 ÷ 2 × 8 + 4
63: (5 ÷ 2) × 8 + 4
64: (5 ÷ 2 × 8) + 4
65: ((5 ÷ 2) × 8) + 4
66: (5 ÷ (2 ÷ 8)) + 4
67: 5 ÷ (2 ÷ 8) + 4
68: (5 + 2 - 4) × 8
69: ((5 + 2) - 4) × 8
70: (5 + (2 - 4)) × 8
71: 4 + 8 × 5 ÷ 2
72: 4 + (8 × 5) ÷ 2
73: 4 + (8 × 5 ÷ 2)
74: 4 + ((8 × 5) ÷ 2)
75: 4 + (8 × (5 ÷ 2))
76: 4 + 8 ×(5 ÷ 2)
77: (4 × (8 - 5)) × 2
78: 4 × (8 - 5) × 2
79: 4 × ((8 - 5) × 2)
80: 4 + 8 ÷ 2 × 5
81: 4 + (8 ÷ 2) × 5
82: 4 + (8 ÷ 2 × 5)
83: 4 + ((8 ÷ 2) × 5)
84: 4 + (8 ÷ (2 ÷ 5))
85: 4 + 8 ÷(2 ÷ 5)
86: 4 + 5 × 8 ÷ 2
87: 4 + (5 × 8) ÷ 2
88: 4 + (5 × 8 ÷ 2)
89: 4 + ((5 × 8) ÷ 2)
90: 4 + (5 × (8 ÷ 2))
91: 4 + 5 ×(8 ÷ 2)
92: 4 × 5 + 8 ÷ 2
93: (4 × 5) + 8 ÷ 2
94: 4 × 5 +(8 ÷ 2)
95: (4 × 5) + (8 ÷ 2)
96: (4 × 5 - 8) × 2
97: ((4 × 5) - 8) × 2
98: 4 + 5 ÷ 2 × 8
99: 4 + (5 ÷ 2) × 8
100: 4 + (5 ÷ 2 × 8)
101: 4 + ((5 ÷ 2) × 8)
102: 4 + (5 ÷ (2 ÷ 8))
103: 4 + 5 ÷(2 ÷ 8)
104: 4 × (2 × (8 - 5))
105: 4 × 2 ×(8 - 5)
106: (4 × 2) × (8 - 5)
107: (4 × 2 - 5) × 8
108: ((4 × 2) - 5) × 8
109: (2 × (8 - 5)) × 4
110: 2 × (8 - 5) × 4
111: 2 × ((8 - 5) × 4)
112: (2 + 5 - 4) × 8
113: ((2 + 5) - 4) × 8
114: (2 + (5 - 4)) × 8
115: 2 × (5 × 4 - 8)
116: 2 × ((5 × 4) - 8)
117: 2 × (4 × (8 - 5))
118: 2 × 4 ×(8 - 5)
119: (2 × 4) × (8 - 5)
120: (2 - 4 + 5) × 8
121: ((2 - 4) + 5) × 8
122: (2 - (4 - 5)) × 8
123: (2 × 4 - 5) × 8
124: ((2 × 4) - 5) × 8
125: 2 × (4 × 5 - 8)
126: 2 × ((4 × 5) - 8)

Answer 2

（7+6-9+11）+（8-5+4+2）=24

Answer 3

(5-4+2)* 8 =24
7.6.9.11这组无解