一根绳子有a米长,剪去五分之三米,还剩多少米?如果剪去它的五分之三,还剩多少米?

题目

一根绳子有a米长,剪去五分之三米,还剩多少米?如果剪去它的五分之三,还剩多少米?

答案

a-0.6a=0.4a
0.4a-0.4*0.6a=0.16a