分数除法的计算法则，抽象难懂，学生不易理解，学后运算时差错较多。经多年的教学实践，我采用分析推理和由学生编题的教法，效果明显提高。下面谈谈我的做法： 一、新授前，先复习整数除法的意义与商不变的除法性质及倒数的概念。出示例题“ 57÷ 56”，由旧知导入迁移到 The division of the calculation of the rules, abstract difficult to understand, students are not easy to understand, more mistakes when computing. After years of teaching practice, I use the analysis of reasoning and teaching by the students, the effect is obviously improved. Here to talk about my approach: First, the new pre-grant, first review the meaning of the integer division and the same division of nature and the concept of reciprocal. We present example question “57 ÷ 56” and migrate from old knowledge import