一根绳子长5/2米,减去2/5,还剩多少米?
问题描述:
一根绳子长5/2米,减去2/5,还剩多少米?
答
5/2-2/5=2.5-0.4=2.1m=21/10m
答
2.5米*3/5=1.5米
一根绳子长5/2米,减去2/5,还剩多少米?
5/2-2/5=2.5-0.4=2.1m=21/10m
2.5米*3/5=1.5米