45x45+55x55=45x45+55x(45+10)=45x45+55x45+55x10=45x(45+55)+550=45x100+550=4500+550=5050
原式=2*45*55=90*55=4950.
45*55+45*55=(45+45)*55=90*55=90*50+90*5=4500+450=4950
45*55+45*55 =45*(55+55) =45*(100+10) =45*100+45*10 =4500+450 =4950
5500
相当与55乘100
55乘54加45乘54用简便方法计算55乘54加45乘54=54*(55+45)=54*100=5400
45*55+55*55=55x(45+55)=55x100=5500
(55+45)*45=4500
55乘55+55乘4655=55*(55+46-1)=55*100=5500