Junior high school mathematics mainly grasps what to learn in senior one, senior two and senior three, and where to start learning. There is an order, such as what to learn first and what to do later.
Junior high school mathematics is divided into several modules, number operation, plane geometry, equation, inequality, function, statistics and probability. In the operation part of numbers, firstly, negative numbers are introduced to extend numbers to rational numbers; Introduce irrational numbers and then extend them to real numbers. Plane geometry, starting from simple parallel lines, and then to triangles, quadrangles, circles and so on. Equation part, from one-dimensional linear equation to two-dimensional linear equation (group) and then to one-dimensional quadratic equation. That's about it.