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1 教材分析1.1 教学内容整体感知“用字母表示数”选自《义务教育课程标准实验书数学(华东师大版)》七年级上册第三章“整式的加减”第一节.用字母表示数,就是用字母代替数.代数之名,可以说是由此而来.因此,用字母表示数既是从算术过渡到代数的桥梁,又是整个初中代数知识的一个重要基础,不仅要引导学生正确认识、深刻理解其意义,还要认识到字母可以与数一起参与运算,用数、字
1 Textbook Analysis 1.1 Overall Teaching Awareness“Number in Alphabetic Numbers” Selected from “Compulsory Education Course Standards Test Book Mathematics (East China Normal University Edition)” Grade 7 of the first grade books “Complete additions/subtractions of whole formulas” Section 1 The use of letters to represent numbers is to use letters instead of numbers. The name of algebra can be said to come from it. Therefore, using letters to represent numbers is not only a bridge from mathematics to algebra, but also an important basis for the entire junior middle school algebra knowledge. It is necessary not only to guide students to correctly understand and profoundly understand their meaning, but also to recognize that letters can participate in calculations together with numbers, using numbers and words.