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二十分之十三减十分之三等于多少
更新时间: 2020-07-15 00:00:00  

分数加减法法则:

1、同分母的分式加减,分母不变,分子相加减;

2、异分母的分式加减,先将分式通分为同分母的分式,再进行加减。

关键词: 二十分 十三 十分 等于 多少

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