教材分析:分数的初步认识是在学习整数基础上进行的,是数的概念的一次扩展。整数是从1开始一个一个数的,学生有这样的生活经验。分数是建立在等分某个单位的基础上,且表达方式、读数的方法都与整数有很大差异。尤其是分数既可以表示一个量,又可以表示整体与部分的关系,内容 Textbook analysis: The initial understanding of scores is based on learning integers, is an extension of the concept of numbers. Integer is a one by one from a number, students have such a life experience. The score is based on an equal division of a unit basis, and the way of expression, reading methods are very different from the integer. In particular, scores can represent an amount, but also can be expressed as a whole and part of the relationship, content