论文部分内容阅读
“圆的周长”一课是苏教版《数学》五年级下册中的教学内容。这节课的重点是通过学生亲自动手操作发现圆周长与直径间的关系,加深其对圆的周长公式的理解,难点是理解掌握圆的周长公式及圆周率。教材的思路是让学生理解“化曲为直”的思想方法,引导学生探究圆的周长与直径的倍数关系,推导出计算圆周长的公式。这样的编排,学生对
“Circle circumference ” a lesson is the teaching content of Jiangsu Education Edition “mathematics” fifth grade. The focus of this lesson is to find out the relationship between the circumference and the diameter through the hands-on operation of the students and deepen their understanding of the formula of the circumference of the circle. The difficulty is to understand the circumference formula and the circumference of the circle. Textbook thinking is to allow students to understand “music straight ” thinking method, to guide students to explore the circumference of the circle and the diameter of the multiple relationship, derived the formula to calculate the circumference. This arrangement, students right