简便计算,请老师解答,123分之321+234分之345+543分之432）×（234分之345+543分之432+321分之12_数学解答

简便计算,请老师解答,
123分之321+234分之345+543分之432）×（234分之345+543分之432+321分之123）-（123分之321+234分之345+543分之432+321分之123)×（234分之345+543分之432）简便计算

人气：143 ℃　时间：2020-06-12 20:46:34

解答

(321/123+345/234+432/543)*(345/234+432/543+123/321)-(321/123+345/234+432/543+123/321)*(345/234+432/543)
=(321/123+345/234+432/543)*(345/234+432/543)+(321/123+345/234+432/543)*(123/321)-(321/123+345/234+432/543)*(345/234+432/543)-(123/321)*(345/234+432/543)
=(321/123+345/234+432/543)*(123/321)-(123/321)*(345/234+432/543)
=(321/123+345/234+432/543-345/234-432/543)*(123/321)
=(321/123)*(123/321)
=1我有点晕