2019年春七年级数学下册第5章分式5.5第2课时分式方程的应用课件新版浙教版20190119253.pptx

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第5章 分式,第2课时 分式方程的应用,学知识,筑方法,勤反思,知识点 列分式方程解决实际问题的步骤,5.5 分式方程,学知识,5.5 分式方程,(900360),(120%),360,5.5 分式方程,x30,(120%)x,30,30米,类型 用分式方程解决实际问题,筑方法,5.5 分式方程,【归纳总结】工程问题的解题思路 (1)工作量: 通常把总工作量看成单位“1”; 每一部分的工作量工作效率工作时间 (2)常用等量关系: 所有人完成的工作量之和总工作量; 合作工作时间合作工作效率总工作量,5.5 分式方程,类型二 利用分式方程的增根求待定字母的值,5.5 分式方程,5.5 分式方程,小结,勤反思,分式方程的应用,列分式方程解应用题,5.5 分式方程,一般步骤,反思,5.5 分式方程,5.5 分式方程,

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