100/20=50/=/60=200/=/80求解

来源：学生作业帮助网编辑：作业帮时间：2024/05/05 21:54:26

100/20=50/__=__/60=200/__=__/80求解
100/20=50/__=__/60=200/__=__/80求解

100/20=50/__=__/60=200/__=__/80求解
100/20=50/_10_=_300_/60=200/40__=_400_/80
根据商不变性质!