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列分式方程解决实际问题和列一元一次方程解决实际问题的思考和处理过程是类似的,但许多学生对于列分式方程解应用题是一头雾水,不知从何处下手。下面笔者就分式方程的列法,浅谈一些个人见解。1明确利用分式方程列应用题的特点这类应用题大多都是同一类问题,涉及三个量创设两种情境,两种情境下同一量是活的,另外两个量之间有联系,一个量之间是信数关系,一个量之间是和差关系。通常我们列方程时,用信数关系的量设未知数,和差关系的量列方程。2明确三大类型的分式方程(1)路程问题。例1一队学生去校外参观,他们出发30分钟
Column fractional equations to solve practical problems and column a linear equation to solve practical problems thinking and handling process is similar, but many students solve the problem of solving column equations is confused, I do not know where to start. The following author on the fractional equation method, talk about some personal opinions. 1 clear the use of fractional equation column characteristics of the application questions Most of these application questions are the same type of problem involves the creation of two sets of three situations, the same amount in both cases is alive, the other two are linked, Between a quantity is the relationship between the number of a relationship between the sum of difference. Usually when we list equations, we use the amount of the relationship between the number of unknowns, and the difference between the amount of column equations. 2 clear the three types of fractional equation (1) distance problem. Example 1 A team of students went to school for a 30-minute departure