“取”、“去”结合求最小公倍数

• 作 者: 吴显静
• 机 构: 普安盘水一小
• 出 处: 贵州教育
• 发表日期: 2004年期
• 关键词: 算理 数学教学 方法简述 连乘积 末法 思维能力 宗下 医说 小丘 多宗

求几个数最小公倍数的教学,历来是小学数学教学的难点。我在教学实践中采用了“取”、“去”结合的方法进行教学,使学生容易理解,口掌握最小公倍数的求法。本文针对这一方法简述如下: 一、从“取”理解算理 在学生理解了“一个数的倍数的质因数,一定包含这个数的全部质因数”及“几个数的公倍数的质因数,一定包含这几个数中每个数所有的质因数”的基础上,进行如下教学:

Seeking the least common multiple of teaching several times, has always been the difficulty of primary school mathematics teaching. In my teaching practice, I used the methods of “taking” and “going” to make teaching easier for students to understand and find the least common multiple. In this paper, this method is briefly described as follows: First, from the “take” to understand the mathematical understanding of students in the “multiple of a prime factor, the prime factor must include all the prime number” and “a few primes of the prime factor , Must contain all the prime factors for each of these numbers ”, proceed as follows: