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数学的研究对象不外乎是数(数量关系)与形(空间形式)这两个方面,小学数学的研究也不例外。在小学数学教学里,“形”除了在数量关系的研究中作为直观形象的材料显示外,主要是安排专门的单元来加以研究,这也就是我们通常所说的“几何初步知识”的教学。众所周知,“几何初步知识”的教学既要研究形体特征的认识,也要解决形体求积(包括周长、面积、体积)的计算。长期以来,由于整个小学数
Mathematic object of study is nothing more than the number (the number of relations) and form (space form) these two aspects, the study of primary mathematics is no exception. In elementary mathematics teaching, “form” is mainly studied by arranging special units to study in addition to being used as visual materials in the study of quantitative relations. This is what we call the teaching of “elementary knowledge of geometry”. It is well known that the teaching of “elementary knowledge of geometry” needs to study not only the understanding of the physical characteristics but also the calculation of the physical quadrature (including the perimeter, area and volume). For a long time, due to the entire primary school