What do you study in math in 8th grade? What to learn in the second year of junior high school

There's a table of contents here, and you can see it clearly.

All but the last chapter of the data are very important.

Learning the fraction formula is conducive to the calculation of the later knowledge, and the calculation questions are directly tested in the high school entrance examination.

Inverse proportional functions can cultivate the idea of functions and prepare for the quadratic functions later, which are also common in exams and daily life, and the physics in the second semester of the second semester of junior high school also requires a very simple knowledge of inverse proportional functions.

The Pythagorean theorem is an important point in geometry, but it is very simple, but it is used very frequently.

Quadrilaterals are also the focus, combined with the previous Pythagorean theorem, triangles, etc., you can directly come up with comprehensive questions.

Although the analysis of the data is not the point, this part of the variance is annoying to calculate, and you can be lazy with a calculator (if you buy that Casio calculator).

The content of mathematics in the second year of junior high school is very crucial, mainly briefly covering the following aspects:

1) Fractional and inverse proportional functions.

Pythagorean theorem, quadrilaterals, data analysis.

2) Rational numbers, irrational numbers, real numbers.

3) Integer. Fractional, quadratic radical.

4) Unary Linear Equations, Unary Quadratic Equations, Binary (Three) Quadratic Equations, Binary Quadratic Equations, Fractional Equations, and Unary Linear Inequality.

5) One-time function.

Quadratic functions, inverse proportional functions.

6) Statistical preliminary, line segments, angles, intersecting lines, parallel lines.

The above content is the basic knowledge of the preliminary definition of mathematics, so it is necessary to do a good job of pre-class, listen carefully in class, take notes, and practice the content after class.

The mathematics content of the second volume of the eighth grade is as follows:

1. Triangle: The figure composed of three thick line segments that are not on the same straight line are connected end to end is called a triangle.

2. Trilateral relationship: the sum of any two sides of the triangle is greater than the third side, and the difference between any two sides is less than the third side.

3. Height: From one vertex of the triangle to the straight line where its opposite side is located, the line segment between the vertex and the perpendicular foot is called the height of the triangle.

4. Midline: In a triangle, the line segment that connects a vertex with the midpoint of its opposite side is called the midline of the triangle.

5. Angle bisector: The bisector of an inner angle of a triangle intersects with the opposite side of the angle, and the line segment between the vertices and intersections of the angle is called the angle bisector of the triangle.

6. Congruence: Two figures that can coincide completely are called congruence.

7. Congruent triangles: Two triangles that can coincide completely are called congruent triangles.

Eight Li sells the town, corresponding vertices: The vertices that coincide with each other in a congruent triangle are called corresponding vertices.

9. Corresponding edges: The sides that coincide with each other in a congruent delay triangle are called corresponding edges.

10. Corresponding angles: The angles that coincide with each other in a congruent triangle are called corresponding angles.

Mathematics in the second year of junior high school: Zhenlu fraction, inverse proportional function, Pythagorean theorem, quadrilateral, data analysis. Where:

Fractions include fractional operations and fractional equations.

Inverse proportional functions include practical problems with inverse proportional functions.

The Pythagorean theorem includes the proof of the Pythagorean theorem and the inverse of the Pythagorean theorem.

Quadrilaterals include parallelograms, with special parallelograms and trapezoids.

Data includes data representation and data fluctuations.

The first volume of the second year of junior high school is: triangles, congruent triangles, axisymmetric symmetry, and multiplication and division of integersFactorizationFractional.

The second volume of the first two is the quadratic radical and the Pythagorean theorem.

Quadrilateral, primary function.

and analysis of data.

Mathematics (mathematics, maths) is a discipline that studies concepts such as quantity, structure, change, space, and information, and belongs to a kind of formal science from a certain point of view.

Mathematics is derived from the use of abstraction and logical reasoning through counting, calculating, measuring, and observing the shape and motion of objects. Mathematics has become a part of education in many countries and regions. It is used in different fields, including science, engineering, medicine, economics, and finance, among others.

Mathematicians also study pure mathematics, which is the substance of mathematics itself, without aiming at any practical application.