I think it's ok. I used to be poor at math, and I was terrified at the sight of math. Later, my mother bought me a junior high school mathematical model solution. After reading and understanding it, it took me a month to learn to use the model solving method in the "model solving method". Now, no matter how big and difficult the exam is, as long as you choose the right model, you will have an idea immediately. Now that I've done much better, I'm not afraid anymore!