《整式的加减》是在学生学习了有理数、用字母表示数和代数式等知识的基础上安排的.该章属于《义务教育数学课程标准》(2011年版)以下简称《标准》)中的“数与代数”部分,其主要内容包括整式、单项式、多项式;合并同类项;去括号;整式的加减运算等.这些内容既是对有理数的概括与抽象,又是后继学习整式的乘除、分式和根式的运算、方程、函数等知识的基础,还 The “integral addition and subtraction” is based on students’ learning of rational numbers, alphabetical algebra, and algebraic knowledge, which belongs to the standard of “Standard of Compulsory Education Mathematics Curriculum (2011 Edition)” The main contents of the “Number and Algebra” section include the whole type, the monomial type, the polynomial type, the merger of similar type items, the parentheses, the integral addition and subtraction operation, etc. These are not only the summation and abstraction of rational numbers but also the multiplication and division of subsequent integrals, Fractional and radical operations, equations, functions and other knowledge base, also