教学分式方程活动中,常常遇到学生提出“解分式方程验根的两种方法,什么情形下用什么方法较适宜,两种方法各自的优缺点各怎样?”等类似的问题.然而大部分教师对此则是一带而过或避而不谈.究其原因,这些教师对如上问题课前未曾有足够的思考,心中无数,或认为解分式方程的验根环节无需花费更多的时间思考与讨论,学生只需知道检验是解分式方程的必要步骤即可.诚然,验根在解分式方程教学中可不做为重点,但在学生提出相关问题时,教师回避,是和新课程倡 In teaching activities of fractional equations, students often come up with two solutions to the root problem of solving the fractional equation: what are the appropriate conditions and what are the advantages and disadvantages of each of the two methods? However, most of the teachers did not talk about it because of the fact that these teachers did not think enough about the above questions and did not mind countless times, or that the root-mean-square solutions of the equation should not cost more More time to think and discuss, students only need to know the test is the necessary steps to solve the fractional equation can be.Of course, the root of the test in the solution of fractional equation teaching can not be as the key, but the students raised the relevant issues, the teacher avoided, Yes and new curriculum advocacy