一根电线长7m,第一次用去3m,第二次用去3/5m,还剩下几米?
问题描述:
一根电线长7m,第一次用去3m,第二次用去3/5m,还剩下几米?
达得好的话还有分
答
3.4
一根电线长7m,第一次用去3m,第二次用去3/5m,还剩下几米?
达得好的话还有分
3.4