Math 1 and Math 2 are science and engineering, and Math 3 is management. The comparison of difficulty is: one > two > three. That is, math one is the most difficult and math three is the easiest.
Learning skills
The first stage: lay the foundation first. Generally before May, textbooks are mainly used. They are: advanced mathematics: based on Tongji University's version 6 and 7 textbooks; Linear algebra: Tongji University published the fifth edition textbook; Probability theory and mathematical statistics: the fourth edition textbook published by Zhejiang University. I spend more time on advanced mathematics in the basic stage in the third grade of mathematics. Combined with the outline, I do some after-school exercises with strong pertinence.
The second stage: focusing on the whole book, mainly strengthening. At this stage, I bought the complete works of Li Yongle and a set of online courses about heaven. So in the second round, I read the whole book in combination with the online class, and the effect was not bad. You can answer questions if you have any questions. This is mainly made by me in the summer vacation.