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15千克比多少千克少四分之一

更新时间: 2020-10-03 00:00:00     

15千克比20千克少4分之1。

设15千克比x千克少4分之1,可得15与0.25x的和等于x,即15等于0.75x,可解得x等于20。

所以15千克比20千克少4分之1。

关键词: 千克 多少 之一

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