2, computer networks and databases, just looking at the name, should not be helpful in the future. Economics is very useful, so is the financial insurance to be studied next semester.
3, if you take the postgraduate entrance examination, the topic itself is not difficult, and mathematics will be three levels. However, there are many people taking the exam, and the competition is naturally fierce. This is the main difficulty.
4. It's normal not to understand economics. Not because it's difficult. I guess it's your economics teacher who specializes in mathematics. He speaks casually in class, whether you understand it or not. You can directly read the English version of "Ten Principles of Economics" (available in Baidu Library), which is very clear and easy to understand, and the sentence structure is also very simple, with a maximum difficulty of 4 levels. I recommend the English version, because this book is really suitable for getting started in terms of structure and content, and it is very helpful for you to learn finance in the future-you always have to take the actuarial exam, CFA or FRM, both of which are English textbooks. Moreover, the English version is more accurate than the Chinese version, and even the best translation will always be lacking. Or you can read the Chinese version of this book, or you can read Western Economics edited by Gao Hongye, which is the designated reference book for almost all economic majors.
5. Should mathematics majors offer programming or modeling courses? This is very useful for studying finance in the future. You can learn it well.