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分式的有关概念和计算是新课程改革后中考的必考内容,由于这一章牵扯的知识点较多,对综合运用知识的能力和计算要求更强,特别是分式求值问题在中考中出现的频率较高,分值较大,方法灵活多样,学生对这部分知识考试中失分现象较严重,怎样提高学生对这部分内容的综合运用能力,灵活准确解答这类题目。通过这几年我连续代初三毕业班及对本章知识在整理复习过程中,我觉得掌握一定的解题技巧,仔细分析题目特征,选择合适的方法是解决的关键。现把分式求值中常见的解题技巧归纳如下:
Fractional concept and calculation of the new curriculum reform in the exam will be compulsory content, as this chapter involves more knowledge points, the ability to comprehensively use knowledge and computing requirements, especially the fractional evaluation problem in the test In the higher frequency, score larger, flexible and diverse methods, students in this part of the knowledge loss score more serious, how to improve students’ comprehensive utilization of this part of the content, flexible and accurate answer to such questions. Through the past few years, I graduated on behalf of the third and third consecutive graduation classes in this chapter knowledge in the process of finishing review, I think some of the skills to solve problems, a careful analysis of the characteristics of the topic, select the appropriate method is the key to solve. The common solution to the problem of fractal now summed up the skills are summarized as follows: