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为了使学生加深对正、反比例意义的理解,掌握解答正、反比例应用题的关键,应当重视正、反比例判断的教学。一、使学生熟悉量与量之间是否相关联应让学生理解“相关联”的含义。两种量中,一种量变化,另一种量也随着变化,两种量之间是有联系的,这样的两种量就是相关联的量。第5、6两节例1、例2,练习十、十二的1、2题,都列出统计表,根据表中两种量具体数值的变化情况,可以判
In order to make students deepen the understanding of positive and inverse proportion and master the key to solve positive and inverse proportion application questions, we should attach importance to the teaching of positive and negative proportion judgment. First, to make students familiar with the relationship between quantity and quantity should allow students to understand the meaning of “associated.” Two kinds of quantity, one kind of change, the other with the amount of change, there is a link between the two kinds of quantities, such two amounts is the amount associated. Section 5,6 cases of Example 1, Example 2, Practice 10, 12, 1, 2 are listed statistical tables, according to the table two kinds of changes in the amount of specific values can be sentenced