“约数和倍数”单元备课札记

• 作 者: 常盛
• 出 处: 云南教育
• 发表日期: 2004年期
• 关键词: 三单元 小学数学课 分解质因数 短除法 算理 展示过程 分解式 彩条 除式 结合质

义务教育六年制小学数学课本节十册第三单元“约数和倍数”，是在学生已学过０和自然数都是整数、整除的概念及整数四则运算的基础上进行教学的，是学习约分、通分、分数四则运算的基础，还为中学学习因式分解作准备。本单元概念多，而且比较抽象，概念间联系紧密且易混淆...

Compulsory education six-year primary school mathematics textbook ten volumes of the third unit “divisor and multiple” is in the students have learned 0 and natural numbers are integers, the concept of divisibility and integer arithmetic operation is based on four learning is learning About points, pass points, the basis of four arithmetic, but also for high school learning factoring to prepare. The concept of this unit, and more abstract, closely linked concepts and confusing ...