论文部分内容阅读
本学期初,学校教务处举行“同课异构”听评课活动,课题是人教版八年级(上册)数学《实数》.在教学这一节课中,不少教师对“在数轴上画出表示√2的点”有些困惑,认为学生还不具备勾股定理知识(勾股定理的学习被安排到八年级下学期了),教学时学生理解困难,教师很难讲解,并认为教材在此安排不严谨,逻辑性不强;针对这一教学问题,我们从教材和数学史料两方面进行了认真地分析和研究.1关于√2的发现√2是人类最早发现的无理数之一.据说,毕达哥拉斯学派一个名叫希帕苏斯的年轻人,第一个发现了正方形的边和
The beginning of this semester, the Office of Academic Affairs held “lesson heterogeneous ” listen to class activities, the topic is the PEP eighth grade (math) mathematics “real number.” In teaching this lesson, many teachers on Draw a point on the number axis that points √2 "Some confusion, that the students do not have the knowledge of Pythagorean Theorem (Pythagorean Theorem learning is arranged to the eighth grade next semester), teaching students understand difficulties, the teacher is difficult to explain, And think the textbook is not arranged in this rigor and logic is not strong; in response to this teaching problem, we carefully analyzed and studied from two aspects of teaching materials and mathematical history.1 The discovery of √2 √2 is the earliest human discovery of irrational number It is said that a young Pythagorean school named Hippocratic, the first to find the square and