Of course, mathematics, physics and chemistry are typical science subjects. When you do the problem, you can pay attention to it from easy to difficult, or you can do the problem directly. It is very important to accumulate method experience in the process of doing the problem. It will certainly be difficult at first, but after a period of time, it will have obvious effects. Specifically, it is not so difficult to do the questions, and some questions are obviously handy. If you stick to it (probably write one or two workbooks seriously), you will definitely see the effect. Finally, I wish you improve your grades! ! ! Come on! ! !