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最大公约数和最小公倍数概念是学习分数的必要基础,直接关系到约分、通分等内容的学习。现就部编教材内容,浅谈最小公倍数的教学问题,供老师们参考。例1,首先由学生分别写出4和6的倍数,通过观察找出它们的公倍数。因为一个数的倍数是无限的,所以它们的公倍数也是无限的,但其中必有一个最小的。从中找出4和6的最小公倍数是12。同时用集合图形表明它们公有的倍数无限多,但也不难看出最小公倍数是12。建议再引导学生用同样方法找出三个数(如:6、8、9)的最小公倍数。然后引导
The concept of the greatest common divisor and the least common multiple are the necessary foundations for learning scores, which are directly related to the learning of about divisions and divisions. Now part of the textbook content, on the teaching of the least common multiple, for teachers reference. Example 1, first by students to write a multiple of 4 and 6, through observation to find their common multiple. Since multiples of a number are infinite, their common multiple is infinite, but there must be a minimum. Find out that the least common multiple of 4 and 6 is 12. At the same time with the collection of graphics that their common multiple of infinite, but it is not hard to see the least common multiple is 12. It is suggested that students be guided to find the least common multiple of three numbers (eg, 6, 8, 9) in the same way. Then guide