内容分析关于增长率(下降率)的问题是历年中考的一个重要考点,2010年安徽、长沙、天津等省市中考试卷中都出现了这种类型的题目,这部分内容同时也是学生学习的一个难点,在教学中引导学生通过实例列出方程,体会不同形式题目的共同特征,可以 Content Analysis The question of the rate of growth (rate of decline) is an important test center over the years. In 2010, such topics were found in the examination papers in provinces and cities such as Anhui, Changsha and Tianjin. This part is also a part of student learning Difficulties in teaching guide students through examples of listed equations, experience the common characteristics of different forms of topics, you can