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一、教学内容北师大版四年级数学上册第四单元第56-58页。二、教材分析乘法分配律一般安排在乘法交换律、结合律的后面学习,乘法分配律建立了乘法和加法之间的联系,具有重要的意义。本课在安排上不再是单纯地给出一些计算的例子,让学生通过计算,发现规律,而是通过学生熟悉的问题情境,帮助学生发现运算定律的现实模型。让学生在具体情境中经历探索的过程,发现乘法分配律,并会用所学的运算定律进行一些简便计算。
First, the teaching content Beijing Normal University edition fourth grade mathematics on the fourth unit page 56-58. Second, the textbook analysis Multiplicative distribution law is generally arranged in the multiplicative exchange law, combined with the law behind the study, multiplication distribution law established the relationship between multiplication and addition, is of great significance. This course is no longer in the arrangement is simply given some examples of calculations, so that students through the calculation, found the law, but through students familiar with the problem situations to help students find the reality of the law of operation of the model. Let students go through the process of exploration in specific situations and find multiplication distribution law, and will use the learned law of arithmetic for some simple calculations.