2 4 7 12 如何算24点
1个回答

1:(2 + 7) × 4 - 12

2:((2 + 7) × 4) - 12

3:(4 × (2 + 7)) - 12

4:4 × (2 + 7) - 12

5:(4 × (7 + 2)) - 12

6:4 × (7 + 2) - 12

7:(7 + 2) × 4 - 12

8:((7 + 2) × 4) - 12

9:12 ÷ (4 - 7 ÷ 2)

10:12 ÷ (4 - (7 ÷ 2))