Multiple-choice questions and fill-in-the-blank questions are generally 5 minutes each. If a question still has no idea for 3 minutes, it should be skipped. It usually takes about 1 1 minute to solve each problem. If you still can't do anything in five minutes, skip it and give up for a while.
Matters needing attention in postgraduate mathematics
You must check the calculation questions, but don't check the proof questions. Key steps must be recalculated in time. If the previous steps are not carefully calculated, even if they can be done later, it will be done in vain, and the whole question will still be zero. For example, when studying the properties of functions, do not make mistakes, simplify the lines of solving equations, do not make mistakes in quadratic matrix, do not make mistakes in the calculation of multiple integrals, and do the second question on the basis of the first question to ensure the correctness of the first question.
If you feel that what you have done is wrong, you must immediately check what you have done before to see if there are any miscalculations or improper use of methods, such as the choice of coordinate system and integration order of double integration, and whether symmetry can be used.