(-19)×91+91×(-81) 简便计算

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(-19)×91+91×(-81)简便计算(-19)×91+91×(-81)简便计算(-19)×91+91×(-81)简便计算(-19)×91+91×(-81)=91×(-19-81)=91×(-10

(-19)×91+91×(-81) 简便计算
(-19)×91+91×(-81) 简便计算

(-19)×91+91×(-81) 简便计算
(-19)×91+91×(-81)
=91×(-19-81)
=91×(-100)
=-9100

(-19)×91+91×(-81) =91(-19-81)=91(-100)=-9100

(-19)×91+91×(-81)
=91×【-19+(-81)】
=-91×100
=-9100

=91X(-19-81)=91X(-100)=-9100