In junior high school, knowledge is different from that in primary school. Many things in junior high school mathematics have begun to be abstracted, and the requirements for thinking ability have been further improved. It is normal for academic performance to decline in a short period of time. You should study harder and learn what you have learned in class. If you have spare capacity, you should go to high school.

But you should also know that there are days behind and mountains outside. There is nothing wrong with you being the first in your class in primary school, but in other classes and schools, there will definitely be people who are equal to you and better than you, but you didn't know it before you went to junior high school. You see, they are always 1 10+. As a result, some other schools got a perfect score of 120 in half the time of the exam. Then, some students got more than 120 points in mathematics in Grade One.

Just make up your mind and do your best.