He is a math loser, most of whom can't solve math problems. Look at the answer first and then understand whether the process is effective? It's so annoying,
Effective, you didn't learn, which means you didn't get started. Think first after reading the questions. If you have an idea, do it according to your own idea, whether it is right or wrong, and then compare it with the answer. If you don't have any ideas, just look at the answers and remember the questions and answers. If you encounter such a problem, you should do it yourself first, and then compare it with the previous similar problems, including the comparison between the question and the answer. Try a few more times, and you will learn math slowly. I made something I didn't understand in mathematics until I realized that I was no longer afraid of it. Come on, believe in yourself!