一、前言数列概念是数学概念的重要组成部分之一。儿童要掌握数列概念,不但要懂得每个数的结构,而且要懂得整个系列的结构以及每个数在一系列数中的位置及其与相邻数的关系。为此必须要在精细观察的基础上对数列整体和各个数进行分析、比较、抽象、概括和推理,也就是要进行紧张的思维活动。数列概念的掌握,又是数的组合(分解)的前提和基础。在数 I. INTRODUCTION The concept of sequence is one of the important parts of mathematical concepts. Children need to understand the concepts of numbers not only to understand the structure of each number, but also to understand the structure of the entire series and the position of each number in a series of numbers and their relationship to the number of neighbors. To this end, we must analyze, compare, abstract, summarize and reason the whole and each number of the series on the basis of careful observation. That is, we must conduct intense thinking activities. The mastery of the concept of sequence, but also the combination of the number (decomposition) of the premise and foundation. In number