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对于乘法分配律来说,新修订教材中只有字母表述,缺少具体的文字描述,在一定程度上对于学生的具体理解和运用产生了一定的障碍。怎样解决这个问题,笔者结合文本,重点谈谈怎样帮助学生建立乘法分配律数学模型。一、选择典型问题,构建基本模型数学是生活,引导学生建构数学模型,是学生体会和理解数学与周边生活联系的重要途径。教师要立足学生生活实际,围绕文本需要,尽可能选择生活的素材,在丰富学生感知的同时,强化他们概念思维。对于乘法分
For the multiplication assignment law, the new revised textbook only contains the alphabetical statement, which lacks a specific description of the text. To a certain extent, it has some obstacles to the students’ specific understanding and application. How to solve this problem, the author combines the text, focusing on how to help students establish mathematical model of multiplication distribution law. First, the choice of typical problems, building the basic model Mathematics is life, to guide students to build mathematical models, is an important way for students to understand and understand the relationship between mathematics and the surrounding life. Teachers should be based on the actual student life, focusing on the text needs, as far as possible to choose the material of life, enrich the perception of students at the same time, strengthen their conceptual thinking. For multiplication points