如题所述
第1个回答 2014-03-15
45×83×2
=90*83
=9*830
=(10-1)*830
=8300-830
=7470追问
=90*83
=9*830
=(10-1)*830
=8300-830
=7470追问
119×36的简便计算
追答119*36
=119*9*4
=119*(10-1)*4
=(1190-119)*4
=1071*4
=4284
谢谢你的帮助
