中文摘要：

理解分数概念对于儿童数学认知发展具有重要意义。但是由于分数概念是一个多含义的概念结构,使得分数概念的理解较为困难。研究者大都认同分数概念包含五重含义：部分—整体、测量、比、商、算子。但是不同学者提出了不同的分数概念结构理论,以说明这些含义之间的关系,并基于这些理论发展了不同的分数概念理解测验。在该领域,今后可以从分数不同含义的心理表征及其关系,分数概念测验编制等方面开展进一步研究。

英文摘要：

Understanding fractional concepts is essential for children＇s mathematical cognitive development.However,the fractional concepts are almost the most complex construct that children encounter in their primary school years,which create a barrier for children to master the concepts.Most scholars agreed that fractional concepts consist of five different but interconnected subconstructs：part-whole,measure,ratio,quotient and operator.Several fractional construct theories have been proposed to elaborate the relationship of these five subconstructs and three fraction-understanding tests have been developed base on these theories.The following questions in this area need further exploration：What are children＇s representations of the five subconstructs and their relationship,and how can we develop more valid tools to measure fractional concepts.