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数感是一种主动地、自觉地理解数和运用数的意识。《数学课程标准(实验稿)》明确指出,数感主要表现在:理解数的意义;能用多种方法来表示数;能在具体的情境中把握数的相对
Sense of number is a sense of initiative and conscious understanding of the number and the use of the number of consciousness. “Mathematics curriculum standard (experimental draft)” clearly pointed out that the sense of the number of mainly in: to understand the meaning of the number; can use a variety of ways to represent the number; in a specific situation to grasp the relative number