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育才小学五年级学生人数在90~110之间,他们在操场上列队,排成3列没有剩余,排成5列缺2人,排成7列缺4人。五年级共有学生多少人?
育才小学五年级学生人数在90~110之间,他们在操场上列队,排成3列没有剩余,排成5列缺2人,排成7列缺4人。五年级共有学生多少人?
发布时间:2020-08-16 14:20:37
育才小学五年级学生人数在90~110之间,他们在操场上列队,排成3列没有剩余,排成5列缺2人,排成7列缺4人。五年级共有学生多少人?
网友回答
只要变‘不同’为‘相同’,就可以了。‘排成3列没有剩余’可以看作排成3列余下3人;‘排成5列缺2人’可以看作排成5列余下3人;‘排成7列缺4人’可以看作排成7列也余下3人。这样,可知五年级学生人数应是3、5、7的最小公倍数(3??=105)加上3,也就是105+3=108(人)。
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