论文部分内容阅读
搞好正、反比例的教学必须把教学重点放在数量关系的分析上: 一、掌握几种数量之间的关系。成比例的量有三个,一个是不变量,另两个是变量;其中,一个变量随着另一个变量的变化而变化。这三种量之间的关系,可以归纳为几种带规律性的数量关系。 1.基本数量关系: 每份数×份数=总数 (因数)×(因数)=(积) 总数=每份数×份数→每份数=(总数)/(份数)→份数=(总数)/(每份数) 积=因数×因数→因数=积/(因数)→因数=积/(因数)
Do a good job, the inverse proportion of teaching must focus on teaching the relationship between quantitative analysis: First, master the relationship between the number of. There are three proportional quantities, one is an invariant and the other two are variables; one variable varies with another. The relationship between the three kinds of quantities, can be summarized as several with a quantitative relationship. 1. Basic Quantity Relationship: Number of Copies × Number of Copies = Total (Factor) × (Factor) = (Total) = Number of Copies × Number of Copies → Number of Copies = (Total) / (Copies) → Copies = (Total) / (per part) Product = factor × factor → factor = product / (factor) → factor = product / (factor)