义务教育六年制小学教学第九册第四单元教学内容是“简易方程”。其中第一小节“用字母表示数”是由算术知识向代数知识过渡的第一步，是本单元教学的基础和关键。因此，教学中要做好由算术到代数的“接轨”工作，为后面学习列方程解应用题打基础。一、由具体到抽象，教给新方 Compulsory education Six-year primary school teaching ninth unit fourth unit of teaching content is “simple equation.” The first of these “alphanumeric characters” is the first step in the transition from arithmetic knowledge to algebraic knowledge, which is the basis and key to the teaching of this unit. Therefore, teaching should be done by the arithmetic to algebra “convergence” work for the back of the column equations to solve the problem of playing the foundation. First, from the specific to the abstract, to teach the new side