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What basic knowledge of junior high school mathematics is needed to learn senior high school mathematics, including the first, second and third grades of junior high school? Online equal high score
1, what are rational numbers and real numbers, which will distinguish rational numbers from natural numbers and real numbers;

2. Equations and functions: one-dimensional linear equation, one-dimensional quadratic equation, two-dimensional linear equation, one-dimensional quadratic function and inverse proportional function. Understand which unknown is y and which is X.

3. Geometry: straight line, ray, line segment, triangle, quadrilateral, circle and their positional relationship, triangle pythagorean theorem, similar triangles proportional relationship.

4. Factorization of algebraic expressions (this is very important, and I found that many students can't do this when teaching).

These seem like a lot, but they are not difficult to learn, just like 1+ 1=2 we learn in primary schools now. I wonder if my answer satisfies you?

Come on! You can ask me again if you don't meet anywhere.