7,9,9,7如何算24?

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7,9,9,7如何算24?

7,9,9,7如何算24?
7,9,9,7如何算24?

7,9,9,7如何算24?
1:(9 + 9 × 7) ÷ 3
2:(9 + (9 × 7)) ÷ 3
3:(9 ÷ 9 + 7) × 3
4:((9 ÷ 9) + 7) × 3
5:(9 + 3) × (9 - 7)
6:(9 + 7 × 9) ÷ 3
7:(9 + (7 × 9)) ÷ 3
8:(9 - 7) × (9 + 3)
9:(9 × 7 + 9) ÷ 3
10:((9 × 7) + 9) ÷ 3
11:(9 - 7) × (3 + 9)
12:(3 + 9) × (9 - 7)
13:3 × (9 ÷ 9 + 7)
14:3 × ((9 ÷ 9) + 7)
15:3 × (7 + 9 ÷ 9)
16:3 × (7 + (9 ÷ 9))
17:(7 + 9 ÷ 9) × 3
18:(7 + (9 ÷ 9)) × 3
19:(7 × 9 + 9) ÷ 3
20:((7 × 9) + 9) ÷ 3