论文部分内容阅读
一、现状呈现正(反)比例的学习是在学习了比的意义、比的化简、比例的意义和基本性质等内容的基础上进行的,是小学第二学段“数与代数”领域的重要内容之一。由于概念本身较为抽象,思考过程复杂,数学关系隐晦,成为老师教学和学生学习的难点之一。综观不同老师的教学,都会围绕“有哪两个相关联的量?什么量变化,什么量也相应地变化?它们的比值(积)是怎样的?”这三个问题展开思考和讨论。但老师们发现学生的思维并没有得到有效激发,对正
First, the status quo presents the positive (anti) proportion of learning is to learn the ratio of the significance of the ratio of simplification, the proportion of the basic nature of the basic content and so on, is the second paragraph of primary school “number and algebra ”One of the important areas of the field. As the concept itself is more abstract, complex thinking process, mathematical relationship is obscure, and become a teacher teaching and student learning difficulties. When we look at the teaching of different teachers, we will focus on the two related quantities, the amount of change and the amount of change, and the ratio (product) of them. What are the three questions? . However, teachers found that students' thinking has not been effectively stimulated and aligned