因式分解是中学代数中知识与技能结合得相当好的一个内容。它属于恒等变形的范畴,是学习数学各学科的重要基础。下面就教学中应注意的三个问题谈一下看法。一、因式分解在运算、变形中的作用在刚讲完整式的乘除法后,接着讲因式分解,学生往往对这种乘法运算的逆变形的作用不理解。例如在整式乘法的练习中有下面的题 Factorization is a very good combination of knowledge and skills in middle school algebra. It belongs to the category of idiosyncratic deformation and is an important basis for learning various disciplines of mathematics. Let’s talk about the three issues that should be noted in teaching. First, the role of factorization in the operation, deformation After just talking about the complete multiplication and division, and then talk about factorization, students often do not understand the role of this multiplication operation of the inverse deformation. For example, in the practice of integer multiplication, there are the following questions