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整式的加减涉及许多概念,准确把握这些概念并注意它们的区别和联系,是解决相关问题的关键.复习这部分知识,同学们可从以下几个方面入手.一、重点难点1,透彻理解本章的概念.本章的主要概念有单项式,多项式,整式,单项式的次数、系数,多项式的次数、项数.2.透彻理解“两种排列”和“三个法则”.“两种排列”是指一个多项式按照某个字母的升幂或降幂排列;“三个法则”是指去括号法则、添括号法则和合并同类项的法则.
Integrative addition and subtraction involves many concepts, accurate grasp of these concepts and pay attention to their differences and contacts, is the key to solve the relevant problems.To review this part of the knowledge, students can start from the following aspects: First, the key difficulties 1, a thorough understanding The concept of this chapter The main concepts of this chapter are monomial, polynomial, integral, the number of monomials, coefficients, the number of polynomials, the number of items.2 thoroughly understand the “two arrangements ” and “three rules ”. “ Two Arrangements ”means that a polynomial is arranged in ascending or descending order of a letter; “ Three Laws ”refers to the rules for bracketed laws, parentheses, and the same items.