The knowledge of the sixth grade of primary school will still involve the mathematics of the first grade, such as equations and so on!

Junior high school mathematics, the first day is mainly to solve equations, algebraic expressions, probability, triangular congruence proof. The second day is mainly about factorization, proportional function and inverse proportional function, and the third day is about proving geometry, circle and quadratic function.

Physics, of course, involves mechanics and electricity, which are important knowledge in junior high school, such as buoyancy. Knowledge of pressure, force and motion, molecular dynamics theory, density and mass, circuit understanding and calculation, force and machinery!

The knowledge of junior high school chemistry is very simple, that is, knowing some elements, chemical equations, periodic table of elements, etc., very simple!

That's all. Study hard, it won't take long! It's just a matter of mastery.