The main knowledge points of rational numbers in 1 and 1 chapters are: rational number concept, reciprocal, absolute value, rational number addition, subtraction, multiplication and division, and scientific counting method.

2. Addition and subtraction of algebraic expressions Chapter 2: Main knowledge points: monomial, polynomial, algebraic expression, similar term, bracket removal rule, addition and subtraction of algebraic expression.

3. The main knowledge points of the third chapter "One-dimensional linear equation" are: the concepts of equation and one-dimensional linear equation, the properties of equation, the solution of one-dimensional linear equation and the application of one-dimensional linear equation to solve practical problems.

4. The main knowledge points of Chapter IV "Preliminary Geometry": related concepts of straight line, ray, line segment and angle, unit and angle system of angle, complementary angle, complementary angle, etc.

5. The main knowledge points of the fifth chapter "Intersecting lines and parallel lines" are: adjacent complementary angles, diagonal vertex angles, vertical lines and their properties, congruent angles, internal angles of the same side, the determination and properties of parallel lines, propositions, theorems and proofs.

6. Chapter VI Main knowledge points of real numbers: the concepts of arithmetic square root, square root, cube root, irrational number and real number, the properties and operations of real numbers.

7. The main knowledge points of Chapter 7 "Plane Cartesian Coordinate System" are: ordered number pairs, coordinates of points and translation of coordinate representation.

8. The main knowledge points of Chapter 8 "Binary linear equations" are: the definition of binary linear equations and their solutions, the definition of binary linear equations and their solutions, the substitution of elimination and addition and subtraction to solve binary linear equations, practical problems and binary linear equations.