简便计算:41*9.9+4.1

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简便计算:41*9.9+4.1
简便计算:41*9.9+4.1

简便计算:41*9.9+4.1
41*9.9+4.1
=4.1*99+4.1*1
=4.1*(99+1)
=4.1*100
=410

=4.1*99+4.1
=4.1*(99+1)
=410

41*9.9+4.1
=4.1x99+4.1
=4.1x(99+1)
=410

=4.1x10x9.9+4.1=4.1x(99+1)=4.1x100=410

41×9.9+4.1
=4.1×10×9.9+4.1
=4.1×﹙10×9.9+1﹚
=4.1×100=410