用简便方法计算:(1)(-19)×91+91×(-81) (2)(-36)×200╮7/18(1)(-19)×91+91×(-81)(2)(-36)×两百又7/18

问题描述:

用简便方法计算:(1)(-19)×91+91×(-81) (2)(-36)×200╮7/18
(1)(-19)×91+91×(-81)
(2)(-36)×两百又7/18