13/10/7+13/10*6/7用简便方法怎么算
问题描述:
13/10/7+13/10*6/7用简便方法怎么算
答
13/10/7+13/10*6/7
=13/10*1/7+13/10*6/7
=13/10*(1/7+6/7)
=13/10*(7/7)
=13/10