The difficulty proportion structure of all math classes is the same. Determine the review direction according to the division of your major! Mathematics 3 is aimed at management discipline, and mathematics 4 is aimed at economic discipline. Specifically, math three is more than math four. There are many infinite series and difference equations in calculus, quadratic in linear algebra and mathematical statistics in probability. Number one: probability theory and mathematical statistics of higher mathematics linear algebra number two: number three: probability theory and mathematical statistics of calculus linear algebra number four: probability theory of calculus linear algebra is obvious, number four is less than number three, so it is relatively simple. Teaching material suggestion: Tongji University Press, the fourth or fifth edition of advanced mathematics or calculus linear algebra, the third edition of probability theory and mathematical statistics, and the counseling book of Zhejiang University Press: Chen Wendeng.