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一、善引善明:孩子们,明确了学习目标,学习就成功了一半!学习内容:(西师版)三年级下册第45页例4及课堂活动第1题,练习八第1、2题。学习目标:1.能区别周长和面积,加深对周长和面积的理解。2.能估测长方形的面积,培养学生的空间观念。学习重难点:能区别长方形的周长和面积。知识链接:1.你会计算长方形的周长吗?应该知道哪些条件?2.要知道一个长方形面积的大小,有哪些办法?
First, the good lead: Good children, clear learning goals, learning half successful! Learning Content: (Western Division) Volume III of the third grade on page 45 Example 4 and classroom activities The first question, practice eight The first two question. Learning Objectives: 1. To distinguish perimeter and area, deepen the understanding of circumference and area. 2. Can estimate the rectangular area, cultivate students’ space concept. Learning heavy and difficult: to distinguish between the perimeter and area of the rectangle. Knowledge links: 1. You will calculate the perimeter of the rectangle it? Should know what conditions? 2. To know the size of a rectangular area, what are the ways?