6,7,8,9的算24点,不能改变数字的顺序

1: 6 × (8 ÷ (9 - 7))
2: 6 × 8 ÷(9 - 7)
3: (6 × 8) ÷ (9 - 7)
4: (6 ÷ (9 - 7)) × 8
5: 6 ÷ (9 - 7) × 8
6: 6 ÷ ((9 - 7) ÷ 8)
7: (8 ÷ (1 + 1)) × 6
8: 8 ÷ (1 + 1) × 6
9: 8 ÷ ((1 + 1) ÷ 6)
10: 8 × (6 ÷ (1 + 1))
11: 8 × 6 ÷(1 + 1)
12: (8 × 6) ÷ (1 + 1)
不改变无解

如果不改变顺序 可能算不出来

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