1.一个数的倒数在4分之1和5分之1之间,这个数是多少? 2.一个自然数与它的倒数的和是5.2,这个自然数是?
人气：195 ℃ 时间：2019-07-25 01:33:05
解答
①9/2
②5.请告诉我解题过程OK？
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