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学生用正、反比例解答应用题时,在判断和找出对应关系上容易出错,而当进行综合练习时,面对变化了的较复杂的比例应用题,更是束手无策。针对这一情况,我运用整体思想把正、反比例应用题同时进行教学,并采用“抓、摘、列、解、检”的“五序法”教和学,在教法中渗透学法,取得了良好的教学效果。在复习了相关的知识后,同时出示两道事理相同的应用题: 1.一辆汽车从甲地开往乙地,前3小时行了54千米,用同样的速度又行了2小时到达乙地。甲乙
When students use positive and inverse proportion to answer the application questions, they are prone to make mistakes in judging and finding out the corresponding relationship. When the students practice the comprehensive exercises, they are at a loss how to deal with the more complicated application questions that have changed. In response to this situation, I use the whole idea to teach positive and inverse proportion questions at the same time, and adopt the “five-sequence” teaching and learning of “capturing, picking, listing, solving and quizzing” Has achieved good teaching results. After reviewing the relevant knowledge, we also present two applications with the same issues: 1. A car travels from A to B, with 54 km in the first 3 hours and another 2 hours in the same speed B A