The intensive reading teaching of primary school mathematics depends on whether students choose properly, on the degree of "guidance" and on the role of "stamina", "guidance" and "correction" in students' learning. So, how can we be accurate? Miao Xian, teachers must realize the arduousness of delving into textbooks, highlight key points in the teaching process, analyze jumbles, and grasp the key points so that the students behind can't figure out the doubts. Only in this way can we realize the transition from knowledge to ability on the basis of understanding what we have learned, and form the necessary ID motivation for further implementing higher-level learning practice (classroom practice). Admittedly, teachers should carefully study students' learning situation, according to the actual situation of students in this class and their knowledge of mathematics. For the teaching of basic knowledge, it focuses on the analysis of the formation process of knowledge, the comparison of the connotation characteristics of basic urgency and the acceptance of straightforward thinking schemes; For the teaching of the four calculations of numbers, it emphasizes the elaboration of English theory, the respect for the old and the love for the young, and the summary of strict calculation rules, so as to promote students' mastery of non-calculation skills and the formation of self-calculation habits; For the teaching of "Four Uses", the focus is on analyzing the relationship between basic numbers and Yan, comparing basic problem-solving ideas and synthesizing basic thinking methods, so as to promote students' understanding of basic mathematical thinking methods and use mathematical knowledge to analyze and solve Yan Dan's practical problems.