19×33+71×33怎么简便计算

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19×33+71×33怎么简便计算19×33+71×33怎么简便计算19×33+71×33怎么简便计算19×33+71×33=(19+71)x33=90x33=90x30+90x3=2700+270=

19×33+71×33怎么简便计算
19×33+71×33怎么简便计算

19×33+71×33怎么简便计算
19×33+71×33
=(19+71)x33
=90x33
=90x30+90x3
=2700+270
=2970

19×33+71×33
=(19+71)*33
=90*33
=2970

19×33+71×33=(19+71)×33=90×33=2970