85乘231除以17怎么简算(拖式)?

问题描述:

85乘231除以17怎么简算(拖式)?

=(85÷17)×231
=5×231
=1155

=231x(85除以17)
=231x5
=1155

85x231÷17=231x(85÷17)
=231x5
=(200+31)x5
=200x5+31x5
=1000+155
=1155