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一、理解因数和倍数的意义1.引出除法算式师:想一想,我们学过的数有哪些?(课件出示:整数、分数、小数)这节课我们就把目光聚焦于整数。(课件出示:20以内的数、百以内的数、千以内的数、万以内的数、亿以内的数、千亿以内的数……)整数这么庞大的家族里面蕴藏了多少奥秘呢?今天,我们首先从除法的角度出发研究两个整数之间的关系。为了方便研究,我们就从100以内的数开始吧!师:(课件出示百数图)请你们任意挑选两个整数组成一个除法算式,并算出得数。
First, the understanding of the significance of factors and multiples 1. Lead to divide division Math division: Think about the number we have learned? (Courseware to produce: integers, fractions, decimals) This lesson we focus on the integer. (Courseware shows: less than 20, less than 100, less than 1000, less than 100 million, less than 100 million, less than 100 billion ...) How many mysteries is there in today’s huge family? , We first study the relationship between two integers from the point of division. In order to facilitate the study, we start from the number of 100! Teacher: (courseware show hundreds of figures) Please arbitrarily select two integers to form a division formula, and calculate the number.