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教学内容:六年制第十二册数学第7、8页例1。教(学)具准备:师生按课文中的图样(把一个圆平均分成16等份),用硬纸做一套教(学)具。教学过程:一、复习迁移1.出示圆的图形,让学生说出各部分名称以及它们之间的关系。揭示课题:前面学过了圆的周长的计算方法,对于圆的面积,怎样计算呢?(板书课题)2.提问:什么叫面积?(生答)什么叫圆的面积?(引导学生答出)我们以前学过哪些简单几何图形面积计算方法?(生答,老师作以下板书)
Teaching content: six years of the twelfth volume of mathematics, p. 7, 8 Example 1. Teach (learn) with preparation: Teachers and students according to the text of the pattern (a circle equally divided into 16 equal parts), with cardboard to do a set of teaching (learning) with. Teaching process: First, review the migration 1. Show a circle of graphics, so that students say each part of the name and the relationship between them. Reveal the subject: learned in front of the calculation of the circle circumference, the area of the circle, how to calculate it? (Board topic) 2. Question: What is the area? (Health answer) What is the area of the circle? Out) What simple geometrical area calculation methods have we learned before?