第2个回答 推荐于2020-12-10
1: (7 + 5) × 3 - 12
2: ((7 + 5) × 3) - 12
3: 7 × (5 ÷ 12 + 3)
4: 7 × ((5 ÷ 12) + 3)
5: (7 + 3) ÷ 5 × 12
6: ((7 + 3) ÷ 5) × 12
7: (7 + 3) ÷ (5 ÷ 12)
8: 7 × (3 + 5 ÷ 12)
9: 7 × (3 + (5 ÷ 12))
10: (7 + 3) × 12 ÷ 5
11: ((7 + 3) × 12) ÷ 5
12: (7 + 3) × (12 ÷ 5)
13: (5 + 7) × 3 - 12
14: ((5 + 7) × 3) - 12
15: (5 ÷ 12 + 3) × 7
16: ((5 ÷ 12) + 3) × 7
17: (3 + 7) ÷ 5 × 12
18: ((3 + 7) ÷ 5) × 12
19: (3 + 7) ÷ (5 ÷ 12)
20: (3 × (7 + 5)) - 12
21: 3 × (7 + 5) - 12
22: (3 + 7) × 12 ÷ 5
23: ((3 + 7) × 12) ÷ 5
24: (3 + 7) × (12 ÷ 5)
25: (3 × (5 + 7)) - 12
26: 3 × (5 + 7) - 12
27: (3 + 5 ÷ 12) × 7
28: (3 + (5 ÷ 12)) × 7
29: 3 × 12 -(7 + 5)
30: (3 × 12) - (7 + 5)
31: 3 × 12 - 7 - 5
32: (3 × 12) - 7 - 5
33: (3 × 12 - 7) - 5
34: ((3 × 12) - 7) - 5
35: 3 × 12 -(5 + 7)
36: (3 × 12) - (5 + 7)
37: 3 × 12 - 5 - 7
38: (3 × 12) - 5 - 7
39: (3 × 12 - 5) - 7
40: ((3 × 12) - 5) - 7
41: (12 × (7 + 3)) ÷ 5
42: 12 × (7 + 3) ÷ 5
43: 12 × ((7 + 3) ÷ 5)
44: 12 ÷ 5 ×(7 + 3)
45: (12 ÷ 5) × (7 + 3)
46: 12 ÷ (5 ÷ (7 + 3))
47: 12 ÷ 5 ×(3 + 7)
48: (12 ÷ 5) × (3 + 7)
49: 12 ÷ (5 ÷ (3 + 7))
50: (12 × (3 + 7)) ÷ 5
51: 12 × (3 + 7) ÷ 5
52: 12 × ((3 + 7) ÷ 5)
53: 12 × 3 -(7 + 5)
54: (12 × 3) - (7 + 5)
55: 12 × 3 - 7 - 5
56: (12 × 3) - 7 - 5
57: (12 × 3 - 7) - 5
58: ((12 × 3) - 7) - 5
59: 12 × 3 -(5 + 7)
60: (12 × 3) - (5 + 7)
61: 12 × 3 - 5 - 7
62: (12 × 3) - 5 - 7
63: (12 × 3 - 5) - 7
64: ((12 × 3) - 5) -7