How to Learn Formal Addition and Subtraction

Abstract

"Addition and Subtraction of Integer Expressions" is the first chapter for students to learn from the operation of numbers to the operation of expressions. It is not only a deepening of the knowledge of the first two chapters of the first algebra, but also an important foundation for learning subsequent knowledge. Therefore, a solid study of the knowledge and methods in this chapter plays an important role in linking the past and the future. To learn the content of this chapter well, students must pay attention to the following three issues: 1. Understanding and mastering the concepts related to integers Mathematical concepts are the cornerstone of the mathematics building. To learn mathematics, the first thing to do is to understand and master mathematical concepts. As you study this chapter, you should understand and master the concepts of monomials, polynomials, integers, and homogeneous terms. The so-called monomials are algebraic expressions that contain only the multiplication of algebraic numerals. Such as 2ab, -a2b, etc. are monomials, because they contain the multiplication of letters. In , although it contains division operations for numbers, for letters, it only contains multiplication operations, so it is a monomial. In -a2b, "-" sign is the sign of its coefficient