数与形结合的问题是小学数学竞赛的重要内容,在各级各类的小学数学竞赛中,涉及这类问题的题目较多。解决这类问题要熟练掌握基本几何图形的一些常用方法和技巧(割、补、平移、翻折、旋转、添辅助线、等积变换等),把较复杂的图形转化为基本的几何图形,把难于求积的图形转化为易于求积的图形。 本讲我们将重点研讨有关图形计算中的一些基本方法和技巧,以求在训练中能充分开拓学生思路、提高学生分析处理事物的能 The combination of number and form is an important part of primary school mathematics competition. At all levels of primary school mathematics competition, there are many topics that involve such problems. To solve such problems to master some of the common geometric methods and techniques of basic geometry (cut, fill, translate, fold, rotate, add auxiliary line, equal transformation, etc.), the more complex graphics into basic geometric shapes, Convert difficult-to-plot graphics to easy-to-plot graphics. This talk we will focus on some of the basic methods and techniques of graphic calculation in order to be able to fully develop the train of thought of students in training to improve the ability of students to analyze and process things