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0.45 99的简算

=0.45x(99+1)=4500

0.45乘九十九怎么简算0.45x99=0.45x(100-1)=0.45x100-0.45=45-0.45=44.55

0.45*99能简算的要简算0.45*99=0.45*(100-1)=0.45*100-0.45*1=45-0.45=44.55

0.45*99 =0.45*(100-1) =0.45*100-0.45*1 =45-0.45 =44.55 你好,本题已解答,如果满意 请点右上角“采纳答案”.

0.45*99=0.45*100-0.45*1=45-0.45=44.5

0.45*99+4.5 =4.5*9.9+4.5*1 =4.5*(9.9+1) =4.5*10.9 =4.5*(10+0.9) =4.5*10+4.5*0.9 =45+4.05 =49.05

=0.45X(100一1)等量变形=0.45X100-0.45X1 利用乘法分配律=100-0.45=答案你自己算算哦

展开全部0.45*99=0.45*(100-1)=0.45*100-0.45=45-0.45=44.55

0.45*(100-1)=45-0.45=44.55

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