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4.2化成分数等于多少
更新时间: 2020-09-20 00:00:00  

一、百分之4、2=0.042;

二、0.042=1000分之42;

三、对第二步进行约分,得:1000分之42=500分之21;

百分之4、2化成分数等于500分之21。

关键词: 化成 分数 等于 多少

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