I have a poor foundation in mathematics and spend most of my time in it. There are also many materials. There are also many supporting teaching AIDS. If the foundation is not good, you can do the following exercises. Just give an answer online, but other teaching AIDS are still necessary. After all, the proportion of high numbers is relatively high. You can buy a supporting teaching aid for the first round of review. My researcher's evaluation seems to be not very good. I recommend the classic Li Yongle handout. Absolute classics are the best, and the three are the same. It feels very good.
Li Yongle's review books are necessary for the postgraduate entrance examination. I don't have a good foundation, so I don't feel enough. In the first round of review, I can match the corresponding sub-item counseling materials. The second round of books is mainly about real problem simulation and so on.
This year 130+ is not bad for people with poor math foundation. I hope to sum up some experience in my constant failure, which will help you! I wish you success in the postgraduate entrance examination!