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分式是学生在掌握了整式概念和基本运算的基础上,通过与分数类比进行学习的。由于分式运算运用了较多的基础知识,运算步骤增多,解题方法灵活多样,学生容易产生符号和运算等错误。分析错因吸取经验,在教学中我认为应注意以下几方面。一、加强自主探究例:当x=时,分式|x|-2x+2的值
The fractional model is based on students’ mastery of the concept of the whole formula and basic calculations, and they learn by analogy with scores. Because the fractional operations use more basic knowledge, the number of calculation steps increases, and the problem-solving methods are flexible and diverse, students are prone to errors such as symbols and operations. Analysis of mistakes due to the absorption of experience, in teaching I think we should pay attention to the following aspects. First, to strengthen self-research cases: When x =, fractional |x|-2x+2 values