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同学们在学习整式的加减时,由于对所学的知识理解得不透彻,计算不仔细,常常在解题中出现一些错误.现将常见的错误归纳如下,以引起同学们的重视.易错点一:对有关概念理解出现错误同学们如果对单项式的概念、系数和次数,多项式的概念和次数,同类项的概念不善辨别,就不容易理解这些概念的内涵.例1下列式子中判断正确的是().A.2a b和12(x-1)2都是单项式B.7ab-7ba=0
When students were learning the additions and subtractions of the whole formula, because they did not understand the knowledge they had learned and the calculations were not careful, they often made mistakes in solving problems. Now the common mistakes are summarized as follows to attract the attention of the students. Misunderstanding One: Misunderstanding the Concept If students are not good at understanding the concepts of the monomial, the coefficient and the number of times, the concept and number of polynomials, and the concept of similar items, it is not easy to understand the connotation of these concepts. Example 1 In the following formula The correct judgment is (). A.2a b and 12 (x-1) 2 are monomials B.7ab-7ba=0