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二分之二加二分之一等于多少
更新时间: 2020-10-04 00:00:00  

分数表示一个数是另一个数的几分之几,或一个事件与所有事件的比例。把单位“1”平均分成若干份,表示这样的一份或几份的数叫分数。分子在上,分母在下。同分母分数相加,分母不变,分子相加。同分母分数相减,分母不变,分子相减。

关键词: 二分 之一 等于 多少

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