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《整式的乘除与因式分解》一章是七年级上册《整式的加减》一章的延续.本章知识点零碎,而且计算量较大.很多同学在学习的过程中对课本上的习题不够重视,认为可有可无,可做可不做.其实,这种想法是错误的.现在,我们就来研究课本上的四道题目,这四道题目所反映出来的数学思想与方法体现在许多题目中,包括中招考试题.同学们若能掌握个中秘笈,解题“功夫”必会再上一层楼..第一道题目是课本第148页习题15.1的第1题.这道题目并不简单,在教学中错误率很高.这说明一些同学对整式中的运算公式理解得不够透彻,掌握得不够熟练.我们来看这道题目:
“The integral multiplication and division and factorization” chapter is a continuation of the seventh grade volume “integral addition and subtraction.” Chapter knowledge of this piece of system, but also a large amount of computation.Many students in the learning process on the textbooks on the problem is not enough In fact, this idea is wrong .Now, we have to study the textbook of the four topics, these four topics reflect the mathematical ideas and methods embodied in many Questions, including the middle school exam questions. If students can master the secrets, problem solving “Kung Fu ” will go to the next level .. The first question is the text of the first 148 questions page 15.1. Road problem is not simple, high error rate in teaching.This shows that some students on the formula in the whole understanding of the formula is not thorough enough, not mastered enough.We look at this topic: