数感(number sense)是指对数的理解或数概念的形成.数感建立起数量与计数之间的联系.数感强调对多与少、相对数量、空间与数量的关系(即数的守恒)、数量的部分与整体的关系等的理解.《义务教育数学课程标准(2011年版)》首次把“数感”置于数学学习六个核心概念(数感、符号感、空间观念、统计观念、应用意识、推理能力)的首位.数学课程标准指出:数感是人的一种基本素养,是人主动自觉地理解和应用数的态 Number sense refers to the understanding of logarithms or the formation of the notion of numbers. Sense of number establishes the connection between quantity and count. Sense of number emphasizes the relationship between quantity and less, relative quantity, space and quantity Conservation), the relationship between the number of parts and the overall understanding of the compulsory education mathematics curriculum standards (2011 Edition) “for the first time” number sense "placed in the six core concepts of mathematical learning (number sense, sense of symbol, space concept , Statistical concept, application awareness, reasoning ability) .Mathematics curriculum standard states: Sense of number is a kind of basic literacy of human beings, and it is the state that people take the initiative to understand and apply