24点 数学给50分

来源：百度知道 编辑：UC知道 时间：2024/05/13 05:05:43
用1，3，7；9，列三道算术算24点,只能用加减乘除(每个数只能用一次)

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)

<1+7>乘以<9除以3>=8乘以3=24

9/3*（7+1）=24

(1+7)X（9÷3)=24

9 × (1 + 7) ÷ 3