Junior high school mathematics is mainly to further deepen primary school mathematics. At first, I studied positive and negative numbers (I have been using ultra-simple all my life, and the exam is not the key regret). Next, I studied the transformation of single and polynomial, which is not the point. It's basically addition, subtraction, multiplication and division, but it's very useful. Anyway, even in high school, there are many topics to use this. These two are useful to life, and there are congruent similarities below, both of which are important contents. Next, this is a very important function. Junior high school is mainly a linear function (including proportional function), inverse proportional function and quadratic function are almost compulsory in the senior high school entrance examination, and the final question is generally function plus geometry, so function is the focus of junior high school. In addition, we should master learning methods, do more topics, summarize types and methods, skip what we think is easy to do to avoid wasting time, and do more difficult topics to constantly strengthen ourselves. There is also reading high school books occasionally. In view of the lack of sunshine in junior high school and the simple writing of the thesis, you may give you some definitions, and then some topics containing high school content are above my learning experience in junior high school. I think it is ok to take at least 150 in the senior high school entrance examination. I have a 149 paper, right? Ha ha.