一条丝带减去1/2米,还剩下全长的3/5这条丝带全长多少分米?

问题描述:

一条丝带减去1/2米,还剩下全长的3/5这条丝带全长多少分米?

1/2÷(1-3/5)=5/4m1/2÷(1-3/5)=5/4m