Mathematical questions are scored on a step-by-step basis, with 20 points per question, usually divided into 4-5 points. The scoring principle is: to give the correct solution ideas and methods to get the basic score; the key steps to get the correct step score; the final answer to get the correct result score. Common missing points include: 2-3 points for calculation errors; 3-5 points for incorrect writing of formulas; 5-8 points for logic jumping and lack of necessary derivation processes; 1 point for unit errors; and no points for answering questions. Candidates are advised to pay attention when solving questions: 1. pre-written explanations and known conditions; 2. Every step of deduction must be justified; 3. Complex calculations are carried out step by step for easy inspection; 4. Write the answer at the end and indicate the unit. Even if the final answer is wrong, you can get most of the steps as long as you think correctly.