Mathematical operation is actually an application problem, which is close to the primary school Olympic math problem; When dealing with this part of mathematical operation, don't emphasize the second kill skill. Spike generally refers to the idea of numerical characteristics, that is, to exclude and choose answers according to their numerical attributes, but this is based on your proficiency in various types of questions, and only in this way can you find the attributes of answers in a short time; The suggestions are as follows: first, pay attention to data analysis, and the accuracy rate can reach 80% after training; Second, it is enough to master more than 50% of the accuracy of mathematical operations, but this requires you to master the typical solutions and ideas of each question type.