一、设计理念本节课主要采用“开放型的探究式”教学模式,让学生通过观察、实验、操作等方式亲身经历数学知识的形成过程。整堂课力求为学生创造一个宽松、自由发展的空间,鼓励学生自主探究、合作交流,在学生“动手”“动脑”“动口”中发现问题、解决问题,真正体现学生的主体地位。二、教学思路 First, the design concept This class is mainly used “open type of inquiry ” teaching mode, allowing students to experience the formation of mathematical knowledge through observation, experiment, operation and other methods. The whole class strives to create a space for students to relax and develop freely, encourage students to explore independently, cooperate and communicate, and find problems and solve problems in the students “hands”“immedial brain”“moving mouth” to truly reflect The student’s dominant position. Second, teaching ideas