用下面的4个数算出结果为24,写
1: (3 + 3 ÷ 7) × 7
2: (3 + (3 ÷ 7)) × 7
3: (3 ÷ 7 + 3) × 7
4: ((3 ÷ 7) + 3) × 7
5: 7 × (3 + 3 ÷ 7)
6: 7 × (3 + (3 ÷ 7))
7: 7 × (3 ÷ 7 + 3)
8: 7 × ((3 ÷ 7) + 3)
1: (5 - 1 ÷ 5) × 5
2: (5 - (1 ÷ 5)) × 5
3: 5 × (5 - 1 ÷ 5)
4: 5 × (5 - (1 ÷ 5))。
1: (3 + 3 ÷ 7) × 7
2: (3 + (3 ÷ 7)) × 7
3: (3 ÷ 7 + 3) × 7
4: ((3 ÷ 7) + 3) × 7
5: 7 × (3 + 3 ÷ 7)
6: 7 × (3 + (3 ÷ 7))
7: 7 × (3 ÷ 7 + 3)
8: 7 × ((3 ÷ 7) + 3)
1: (5 - 1 ÷ 5) × 5
2: (5 - (1 ÷ 5)) × 5
3: 5 × (5 - 1 ÷ 5)
4: 5 × (5 - (1 ÷ 5))。
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