3，1，7，9只能用一次怎么算等于24

来源：百度知道 编辑：UC知道 时间：2024/05/11 19:14:53
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9/3*(1+7)=24

(7 + 1) × (9 ÷ 3)

1: (1 + 7) ÷ 3 × 9
2: ((1 + 7) ÷ 3) × 9
3: (1 + 7) ÷ (3 ÷ 9)
4: (1 + 7) × 9 ÷ 3
5: ((1 + 7) × 9) ÷ 3
6: (1 + 7) × (9 ÷ 3)
7: (7 + 1) ÷ 3 × 9
8: ((7 + 1) ÷ 3) × 9
9: (7 + 1) ÷ (3 ÷ 9)
10: (7 + 1) × 9 ÷ 3
11: ((7 + 1) × 9) ÷ 3
12: (7 + 1) × (9 ÷ 3)
13: (9 × (1 + 7)) ÷ 3
14: 9 × (1 + 7) ÷ 3
15: 9 × ((1 + 7) ÷ 3)
16: 9 ÷ 3 ×(1 + 7)
17: (9 ÷ 3) × (1 + 7)
18: 9 ÷ (3 ÷ (1 + 7))
19: 9 ÷ 3 ×(7 + 1)
20: (9 ÷ 3) × (7 + 1)
21: 9 ÷ (3 ÷ (7 + 1))
22: (9 × (7 + 1)) ÷ 3
23: 9 × (7 + 1) ÷ 3
24: 9 × ((7 + 1) ÷ 3)