简便计算,请老师解答,
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/07/10 08:57:39
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
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
![简便计算,请老师解答,](/uploads/image/z/18348627-3-7.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%2C%E8%AF%B7%E8%80%81%E5%B8%88%E8%A7%A3%E7%AD%94%2C)
(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
再问: 我有点晕
=(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
再问: 我有点晕