几十年来，国内小学数学教科书在“圆”的语义方面问、学教科书里不出现圆的定义），一直与中学教科书存在互不相容的矛盾，由之而来的教学的困惑和争议亦一直未解决。对此，笔者力图开凿史料考证工作与数学教育的契合点。本文简要给出有关考据，为解决上述矛盾、改进教学和教 For decades, domestic elementary school mathematics textbooks have asked questions about the semantics of “circle” and there is no round definition in textbooks). They have always had incompatible contradictions with textbooks in secondary schools. The confusion and controversy in teaching Has not been solved. In this regard, I tried to dig historical research work and math education fit point. This article gives a brief summary of the relevant test, in order to solve the above contradictions and improve teaching and teaching