Math is very important, because if you can't do it, you can't live a better life, such as discounts. Of course, if your Chinese is not good, you may not be able to understand all the math problems.
English is very important, it only concerns your future. If you want to work in a foreign company instead of a state-owned enterprise in the future, or want to study abroad and learn deeper knowledge, English will help you. Mastering one more language is of great benefit to you. But how can you talk about a foreign language if you can't speak your mother tongue?
Science is very important because society is progressing and human beings are advancing. Without science, society would stop and there would be no more knowledge. Besides, most successful people have made achievements in science.
Generally speaking, Chinese literature is not good, and nothing is useful. Even if you are good at math (of course, it is impossible to be bad at Chinese) and good at English, you only know a lot of science, but you are not good at communicating with people and don't know how to speak and express your views. What's the use of learning so much knowledge?
Therefore, Chinese is really important.