9 7 12 12 算24点不能改变位置,允许加括号和符号.算出24 .

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9 7 12 12 算24点不能改变位置,允许加括号和符号.算出24 .
9 7 12 12 算24点
不能改变位置,允许加括号和符号.
算出24 .

9 7 12 12 算24点不能改变位置,允许加括号和符号.算出24 .
9*12-7*12

1: 9 × 12 - 7 × 12
2: (9 × 12) - 7 × 12
3: 9 × 12 -(7 × 12)
4: (9 × 12) - (7 × 12)
5: 9 × 12 - 12 × 7
6: (9 × 12) - 12 × 7
7: 9 × 12 -(12 × 7)
8: (9 × 12) - (12 × 7...

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1: 9 × 12 - 7 × 12
2: (9 × 12) - 7 × 12
3: 9 × 12 -(7 × 12)
4: (9 × 12) - (7 × 12)
5: 9 × 12 - 12 × 7
6: (9 × 12) - 12 × 7
7: 9 × 12 -(12 × 7)
8: (9 × 12) - (12 × 7)
9: 12 × 9 - 7 × 12
10: (12 × 9) - 7 × 12
11: 12 × 9 -(7 × 12)
12: (12 × 9) - (7 × 12)
13: 12 × 9 - 12 × 7
14: (12 × 9) - 12 × 7
15: 12 × 9 -(12 × 7)
16: (12 × 9) - (12 × 7)

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