Question

用2、2、4、8算24点，列出4个算式。急急急！！！

Answer 1

(2+2)×4+8=24；
2×4+2×8=24；
(4-2÷2)×8=24；
8×(2+4)÷2=24
这是四个基本算法。每个基本算法都可以变成略有不同的算法。

Answer 2

1: (2 + 2) × 4 + 8
2: ((2 + 2) × 4) + 8
3: 2 × 2 × 4 + 8
4: (2 × 2) × 4 + 8
5: (2 × 2 × 4) + 8
6: ((2 × 2) × 4) + 8
7: (2 × (2 × 4)) + 8
8: 2 × (2 × 4) + 8
9: (2 × (2 + 8)) + 4
10: 2 × (2 + 8) + 4
11: 2 × (2 × 8 - 4)
12: 2 × ((2 × 8) - 4)
13: (2 + 4) ÷ 2 × 8
14: ((2 + 4) ÷ 2) × 8
15: (2 + 4) ÷ (2 ÷ 8)
16: 2 × 4 + 2 × 8
17: (2 × 4) + 2 × 8
18: 2 × 4 +(2 × 8)
19: (2 × 4) + (2 × 8)
20: 2 × 4 × 2 + 8
21: (2 × 4) × 2 + 8
22: (2 × 4 × 2) + 8
23: ((2 × 4) × 2) + 8
24: (2 × (4 × 2)) + 8
25: 2 × (4 × 2) + 8
26: (2 + 4) × 8 ÷ 2
27: ((2 + 4) × 8) ÷ 2
28: (2 + 4) × (8 ÷ 2)
29: 2 × 4 + 8 × 2
30: (2 × 4) + 8 × 2
31: 2 × 4 +(8 × 2)
32: (2 × 4) + (8 × 2)
33: (2 + 8) × 2 + 4
34: ((2 + 8) × 2) + 4
35: (2 + 8 ÷ 2) × 4
36: (2 + (8 ÷ 2)) × 4
37: (2 × (8 + 2)) + 4
38: 2 × (8 + 2) + 4
39: 2 × 8 + 2 × 4
40: (2 × 8) + 2 × 4
41: 2 × 8 +(2 × 4)
42: (2 × 8) + (2 × 4)
43: 2 × (8 × 2 - 4)
44: 2 × ((8 × 2) - 4)
45: 2 × 8 + 4 × 2
46: (2 × 8) + 4 × 2
47: 2 × 8 +(4 × 2)
48: (2 × 8) + (4 × 2)
49: (2 × 8 - 4) × 2
50: ((2 × 8) - 4) × 2
51: 4 + (2 × (2 + 8))
52: 4 + 2 ×(2 + 8)
53: (4 + 2) ÷ 2 × 8
54: ((4 + 2) ÷ 2) × 8
55: (4 + 2) ÷ (2 ÷ 8)
56: (4 - 2 ÷ 2) × 8
57: (4 - (2 ÷ 2)) × 8
58: (4 × (2 + 2)) + 8
59: 4 × (2 + 2) + 8
60: 4 × 2 + 2 × 8
61: (4 × 2) + 2 × 8
62: 4 × 2 +(2 × 8)
63: (4 × 2) + (2 × 8)
64: 4 × 2 × 2 + 8
65: (4 × 2) × 2 + 8
66: (4 × 2 × 2) + 8
67: ((4 × 2) × 2) + 8
68: (4 × (2 × 2)) + 8
69: 4 × (2 × 2) + 8
70: 4 + (2 + 8) × 2
71: 4 + ((2 + 8) × 2)
72: 4 + (2 × (8 + 2))
73: 4 + 2 ×(8 + 2)
74: (4 + 2) × 8 ÷ 2
75: ((4 + 2) × 8) ÷ 2
76: (4 + 2) × (8 ÷ 2)
77: 4 × 2 + 8 × 2
78: (4 × 2) + 8 × 2
79: 4 × 2 +(8 × 2)
80: (4 × 2) + (8 × 2)
81: 4 × (2 + 8 ÷ 2)
82: 4 × (2 + (8 ÷ 2))
83: 4 + (8 + 2) × 2
84: 4 + ((8 + 2) × 2)
85: 4 × (8 ÷ 2 + 2)
86: 4 × ((8 ÷ 2) + 2)
87: 8 + (2 + 2) × 4
88: 8 + ((2 + 2) × 4)
89: (8 + 2) × 2 + 4
90: ((8 + 2) × 2) + 4
91: 8 + 2 × 2 × 4
92: 8 + (2 × 2) × 4
93: 8 + (2 × 2 × 4)
94: 8 + ((2 × 2) × 4)
95: 8 + (2 × (2 × 4))
96: 8 + 2 ×(2 × 4)
97: 8 × 2 + 2 × 4
98: (8 × 2) + 2 × 4
99: 8 × 2 +(2 × 4)
100: (8 × 2) + (2 × 4)
101: (8 ÷ 2 + 2) × 4
102: ((8 ÷ 2) + 2) × 4
103: 8 ÷ 2 ×(2 + 4)
104: (8 ÷ 2) × (2 + 4)
105: 8 ÷ (2 ÷ (2 + 4))
106: 8 + 2 × 4 × 2
107: 8 + (2 × 4) × 2
108: 8 + (2 × 4 × 2)
109: 8 + ((2 × 4) × 2)
110: 8 + (2 × (4 × 2))
111: 8 + 2 ×(4 × 2)
112: 8 × 2 + 4 × 2
113: (8 × 2) + 4 × 2
114: 8 × 2 +(4 × 2)
115: (8 × 2) + (4 × 2)
116: (8 × (2 + 4)) ÷ 2
117: 8 × (2 + 4) ÷ 2
118: 8 × ((2 + 4) ÷ 2)
119: (8 × 2 - 4) × 2
120: ((8 × 2) - 4) × 2
121: 8 ÷ 2 ×(4 + 2)
122: (8 ÷ 2) × (4 + 2)
123: 8 ÷ (2 ÷ (4 + 2))
124: 8 + (4 × (2 + 2))
125: 8 + 4 ×(2 + 2)
126: 8 + 4 × 2 × 2
127: 8 + (4 × 2) × 2
128: 8 + (4 × 2 × 2)
129: 8 + ((4 × 2) × 2)
130: 8 + (4 × (2 × 2))
131: 8 + 4 ×(2 × 2)
132: (8 × (4 + 2)) ÷ 2
133: 8 × (4 + 2) ÷ 2
134: 8 × ((4 + 2) ÷ 2)
135: 8 × (4 - 2 ÷ 2)
136: 8 × (4 - (2 ÷ 2))