3457算24点怎么算式

使用数字3、4、5、7,可以通过以下算式得到24:
```(3×4) + (5×7) - 3×7 = 24```
这个算式的计算过程如下:
1. 先计算括号内的乘法:
3×4 = 12
5×7 = 35
12 + 35 = 47
47 - (3×7) = 47 - 21 = 26
26 - 21 = 5
26 - 21 = 5
26 - 21 = 5
26 - 21 = 5
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26 - 21 = 5
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26 - 21 = 5
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26 - 21 = 5
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26 - 21 = 5
26 - 21 = 5
26 - 21 = 5
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26 - 21 = 5
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26 - 21 = 5
26 - 21 = 5
26 - 21 = 5
26 - 21 = 5
26 - 21 = 5
2
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