I suggest that you read books on chemistry and mathematics systematically before you do the problem. After all, the knowledge points are all in books, especially chemistry!

I'm a sophomore now. Before the middle school entrance examination, my math score was 100. In the last year (65,438+00), I had a difficult math test.

As a result, I got more than 130 points, which seems to be the second grade. If my foundation is poor, I will make up too difficult questions, and don't waste energy and time.

Pay attention to basic and intermediate problems. Without other guarantees, the chemical foundation can probably be obtained 130.

As for what kind of learning method to use, it depends on yourself. After all, the method that suits you is the best.