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Discuz Math Forum»Forum › Mathematics › High School › 是否有歧义？
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是否有歧义？

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realnumber

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realnumber posted 2019-10-22 07:40 |Read mode
比5/7少1/10的数是多少？

一种理解5/7-1/10
还有一种5/7×(1-1/10)=(5/7)×(9/10)



又这样是没问题的，“比5/7吨少1/10吨的是多少？”，那么是减法
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