一根钢筋截去它的30%,还剩21米,如果截去它的5/7,还剩多少米?RT
问题描述:
一根钢筋截去它的30%,还剩21米,如果截去它的5/7,还剩多少米?
RT
答
21*%30*5/7
一根钢筋截去它的30%,还剩21米,如果截去它的5/7,还剩多少米?
RT
21*%30*5/7