一条绳子减掉1/5,再接上80米,这时绳长与原来绳长的比是8:5,这条绳子原来长()米?
问题描述:
一条绳子减掉1/5,再接上80米,这时绳长与原来绳长的比是8:5,这条绳子原来长()米?
只要答案
答
80÷(8/5-1+1/5)
=80÷4/5
=100(米)
一条绳子减掉1/5,再接上80米,这时绳长与原来绳长的比是8:5,这条绳子原来长(100)米.