笔者通过多年对高考题和竞赛题的研究发现,很多试题均能在课本中找到题根,有的是对例题的改编,有的是对习题的改编,还有对例题、习题的拓展或延伸,因此,如何用好教材中的例习题,是教育工作者值得研究的课题。课堂教学活动要以教材为准则,解题教学要以课本例习题为基础,并作合理变式,适度拓展,充分发挥例习题所蕴含的数学问题的典型性、 After years of research on college entrance examination questions and competition questions, the author found that many questions can be found in textbooks, some are adaptation of examples, some are adaptations of exercises, and the expansion or extension of examples and exercises, therefore, how Good use of textbooks in the case of exercises, educators worthy of study. Classroom teaching activities should be based on the textbook as a criterion, problem-solving teaching should be based on the textbook exercises, and make reasonable variations, appropriate expansion, give full play to the typical problem of mathematical problems,