数感是人对数与运算的一般理解,是主动地、自觉地理解或运用数的态度与意识;它是将数学与现实问题建立起联系的桥梁,能使人眼中看到的世界有量化的意味,使人用数学的方法思考问题;它的形成是一个渐进的、沉淀的、积累的过程。一、在生活体验中建立数感我在教“学厘米”“和米” Sense of number is the general understanding of human logarithm and operation, and it is the attitude and consciousness of actively and consciously understanding or using numbers. It is a bridge connecting the mathematics and the reality, and can make the world seen in human eyes quantify Means that people use mathematical methods to think about the problem; its formation is a gradual, sedimentary, accumulated process. First, in the life experience to create a sense of number I was teaching “cm” and “rice”