The seventh grade consists of two volumes.

Rational numbers, addition and subtraction of algebraic expressions, linear equations of one variable, preliminary understanding of graphs, intersecting lines and parallel lines, plane rectangular coordinate system, triangle, binary linear equations, inequalities and inequality groups, data collection, collation and description.

Two volumes in the eighth grade.

The height, midline and angle bisector of a triangle are the main line segments in the triangle, and the angles related to the triangle have internal angles and external angles.

The textbook lets students know the stability of triangles through experiments. On the basis of knowing that the sum of the internal angles of the triangle is equal to 180, they conduct reasoning and argumentation, thus obtaining the properties of the external angles of the triangle. Then, by popularizing the related concepts of triangle and introducing the related concepts of polygon, the sum, external angle and formula of polygon are studied by using the related properties of triangle.

Ninth grade, two volumes.

Learning content: quadratic root, quadratic equation, circle, quadratic function, rotation, probability, solving right triangle.

Extended data:

Basic skills that students should master

(1) can be demonstrated and calculated with some concepts and properties about intersecting lines, parallel lines, triangles, quadrilaterals, similar shapes and circles.

(2) Be able to use tools such as straightedge, compass, graduated scale, triangle and protractor to draw graphs, and use straightedge and compass as common basic graphs to solve the simplest geometric drawing problem.

Thinking ability mainly refers to: observation, experiment, comparison, guess, analysis, synthesis, abstraction and generalization; Able to use induction, deduction and analogy for reasoning; Will logically and accurately explain their own ideas and opinions; Will use mathematical concepts, principles, ideas and methods to distinguish mathematical relations. Form good ideological quality and improve thinking level.

Operational ability refers to: being able to perform operations correctly according to laws and formulas and understanding the arithmeticalness of operations; Can seek and design a reasonable and concise operation mode according to the conditions of the problem.

The concept of space mainly refers to: the ability to imagine geometric figures from simple objects and the shape of objects from geometric figures; Can separate simple and basic graphics from more complex plane graphics; Be able to find out the basic elements and their relationships in basic graphics; Be able to make or draw graphics according to conditions.

Baidu Encyclopedia-Middle School Mathematics (Subject)