数感在《数学课程标准》中第一次明确提出,并在“数感、符号感、空间观念、统计观念、应用意识、推理能力”六个核心概念中摆在首要位置,可以看出建立数感这一内容在数学教学中是一个重点。数感是对数 The sense of number is clearly put forward for the first time in the “Mathematics Curriculum Standard”, and it is the primary position in the six core concepts of “sense of number, sense of symbol, concept of space, concept of statistics, sense of application, reasoning ability ” The establishment of a sense of number of this content in mathematics teaching is a key point. Number sense is logarithmic