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30比20多百分之几
更新时间: 2020-10-29 00:00:00  

(30-20)÷20=10÷20=50%,所以30比20多50%。百分数与分数的意义不是完全相同。分数可以表示一个数占单位一的几分之几,还可以表示一个数量,如2分之1米;而百分数却只能表示一个数占单位一的百分之几,不能表示数。

关键词: 百分之

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