238除以238又239分之238 怎样计算快238/238又239分之238
问题描述:
238除以238又239分之238 怎样计算
快
238/238又239分之238
答
238/(238+238/239)
=238/[238+(238+1-1)/239]
=238/(239-1/239)
=238/[(239^2-1)/239]
=(238*239)/[(239+1)*(239-1)]
=239/240-.-
答
等于238除以(238+238/239)
=1+239
=240
答
238/[238+238/239]
=238/[238(1+1/239]
=1/[1+1/239]
=1/[240/239]
=239/240