There are 6 junior high school mathematics books, two volumes for seventh grade, two volumes for eighth grade, and two volumes for ninth grade.

Two volumes for seventh graders

Rational numbers, addition and subtraction of integers, linear equations of one variable, preliminary understanding of graphics, intersecting lines and parallel lines, plane rectangular coordinate system, triangles, linear equations of two variables Collection, organization and description of equations, inequalities and groups of inequalities, data.

Two volumes for eighth graders

The altitude, midline and angle bisector of a triangle are the main line segments in a triangle. The angles related to the triangle include interior angles and exterior angles.

The textbook allows students to understand the stability of triangles through experiments. On the basis of knowing that the sum of the interior angles of a triangle is equal to 180°, they can conduct reasoning and argumentation to obtain the properties of the exterior angles of a triangle. Then, by promoting the relevant concepts of triangles, the relevant concepts of polygons are introduced, and the formulas of the sum of interior angles and the sum of exterior angles of polygons are studied using the relevant properties of triangles.

Two volumes for ninth graders

Learning content: quadratic radicals, quadratic equations, circles, quadratic functions, rotation, probability, solving right triangles.

Extended information:

Basic skills that students should master

(1) Be able to use relevant intersecting lines, parallel lines, triangles, quadrilaterals, similar shapes and circles Demonstrate and calculate some concepts and properties.

(2) Be able to use rulers, compasses, scales, triangles, protractors and other tools to draw graphics, and be able to use rulers and compasses to draw commonly used basic graphics, and be able to solve the simplest geometric operations. Figure title.

Thinking ability mainly refers to: being able to observe, experiment, compare, conjecture, analyze, synthesize, abstract and generalize; being able to reason using induction, deduction and analogy; being able to explain one's own ideas logically and accurately Thoughts and perspectives; be able to use mathematical concepts, principles, ideas and methods to identify mathematical relationships. Form good ideological quality and improve thinking level.

Computational ability refers to: being able to perform operations correctly according to rules, formulas, etc., and understanding the arithmetic of operations; being able to seek and design reasonable and concise operation methods based on the conditions of the problem.

Spatial concept mainly refers to: being able to imagine geometric figures from simple-shaped physical objects, and imagining the shape of physical objects from geometric figures; being able to decompose simple and basic figures from more complex plane figures; being able to Find basic elements and their relationships in basic graphics; be able to make or draw graphics according to conditions.

Baidu Encyclopedia-Middle School Mathematics (Subject)