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【课前思考】学生在三年级上册已经学习了把一个物体或图形平均分成若干份,用分数表示这样的一份或几份。以此为基础,“认识几分之一(二)”这节课是通过把几个物体组成的整体平均分成若干份,引导学生用分数表示这样的一份,进一步丰富学生对分数的理解,并为接下来认识小数以及今后抽象出分数概念做好知识储备。这节课也听过不少老师上过,教师都能清楚地呈现例题,并一一引导,学生们似乎都能很轻松地就回答出一个整体平均分成几份,每
[Thinking before class] Students in the third grade have learned to classify an object or figure into several equal parts, with one or more such scores. Based on this, “know a few (b) ” This lesson is divided into several parts by the average of several objects, to guide students to use such a score, to further enrich the students on the score Understand, and prepare for the knowledge of fractional numbers and the abstraction of fractional concepts in the future. This class has also heard many teachers, teachers can clearly present examples, and guide them one by one, the students seem to be able to easily answer an overall average divided into several, each