45乘99=45*100-45=4500-45=4455 希望能帮到你,请采纳正确答案.你的点赞或采纳是我继续帮助其他人的动力
45X100-45=4455
99*45 =(100-1)*45 =45*100-45*1 =4500-45 =4455
45*99=45*(100-1)=45*100-45=4500-45=4455
=45*(100-1) =45*100-45 =4455
45*99=45*(100-1)=4500-45=4455
45x100-45=4500-45=4455
45x(99+1) =45x100 =4500 45个99加上一个45就等于100个45
45乘100减45等于4455
你简便计算过程如下45*99+99=45*99+1*99=(45+1)*99=46*99=46*(100-1)=46*100-46*1=4600-46=4554 望采纳