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《数学课程标准》(2011年版)指出:“数学就是研究现实中数量关系和空间形式的一门科学。”那么数量关系是什么呢?通常所说的数量关系,多是指生产、生活中具体的数量关系,如“单价×数量=总价”等。实际上,四则运算意义本身就包含着经过高度抽象的、最基本的数量关系。在数学教学中,我们常常将数量关系作如下划分:从抽象程度来分,可分为基本数量关系(四则运算意义及其逆
The Mathematics Curriculum Standard (2011 Edition) states: “Mathematics is a science that studies the quantitative relations and the spatial forms of reality.” What is the quantitative relationship? The quantitative relations usually refer to production and living In the specific number of relations, such as “unit price quantity = total ” and so on. In fact, the meaning of the four operations itself contains a highly abstract, the most basic quantitative relationship. In mathematics teaching, we often divide the quantitative relationship as follows: from the degree of abstraction, can be divided into the basic quantitative relationship (four arithmetic meaning and its inverse