Looking at vocational college entrance examination classes such as vocational high school math counseling books, the math foundation is not very good, and I want to work hard after class. . What book is good? Mathematics must be understood in class first. Since you don't understand, you should preview before class. The foundation is not good, you can't be impatient. It's no use doing too much. The examples in the book are also done in the preview. You can buy Analysis of Important and Difficult Points, which is a good book. If you are satisfied, please recommend it. You can take me, too. I am not bad at math. )