273*99=273*100-273=27300-273=27027

这个还要怎么简算啊? 2.73*100=273 附:用简便方法计算 2.73*99 2.73*99 =2.73x(100-1) =2.73x100-2.73x1 =273-2.73 =270.27

273*99+273 =273*(99+1) =273*100 =27300

=2.73*100-2.73=273-2.73=270.27

273*(99+1)=2730

273*99=273x(100-1)=273x100-273x1=27300-273=27027

4.86x99=4.86x(100-1)=4.86x100-4.86x1=481.14

275X99=275X(100-1)=275X100-275X1=27500-275=27225

9.9*273=(10-0.1)*273=10*273-0.1*273=2730-27.3=2702.7

427X99 的简便方法如下: 427*(100-1)=427*100-427*1=42700-427=42700-(430-3)=42700-430+3=43100+3=43103. 这里用到补数乘法运算方法.补数乘法有补数减乘法,补数加乘法,补数加减混合乘法等三种. 1.补数定义 凑数整十、整