9*17+9÷17-5*17+45÷17
问题描述:
9*17+9÷17-5*17+45÷17
用简便方法!
答
9*17+9/17-5*17+45/17
=(9-5)*17+(9+45)/17
=4*17+54/17
=4*17+3又3/17
=71又3/17