“用字母表示数”是代数教学中的一个难点.这部分内容从基础知识上看,体现了数向式的过渡;从学生的思维上看,体现了直观形象思维向初步抽象思维过渡.因此,深入探讨这部分内容的教与学,对搞好中小学数学的衔接以及初中代数的教学有着重要的意义.下面谈一点粗浅的认识.一、做好知识的衔接,抓好知识的深化“用字母表示数”初一学生已在小学初步接触过.刚上初中一年级的学生,他们在小学里接触到的是确定的、具体的、特殊的数,他们的思维方式是以直观形象思维为主;从初中开始他们将要大量接触的是不确定的、抽象的含字母的式,其思维方 The number of alphanumeric characters is a difficult point in the process of algebra teaching.This part of content shows the transition from the basic point of view to the numeral direction, and from the thinking of the students, it embodies the transition from visual thinking to the abstract thinking. , In-depth discussion of this part of the teaching and learning, to improve the convergence of primary and secondary mathematics and junior high school algebra teaching is of great significance .Further talk about a little superficial understanding .To do a good job of knowledge, grasp the deepening of knowledge “ The number of letters ”The first students have been in primary contact with freshmen." The first year of junior high school students, they come into contact with elementary school is a specific, specific, special number, their way of thinking is intuitive thinking Dominated; starting from junior high school they will be a lot of exposure is uncertain, abstract alphabetical style, its thinking side