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数感就是一个人对数的意义和运算的直觉感知,是一种基本的数学素养,是理解数和应用数进行有效运算的能力,是自觉地运用数学的思考方法对具体问题进行分析处理的能力。数感建立在明确的数概念和有效地进行计算等活动的基础上,是将数学与现实问题建立联系的桥梁。《数学课程标准(实验稿)》中指出:“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大小关系;能用数来表达和交流信息;能为解决问题而选择适当的算法;能估计运算的结果,并对结果的合理性作出解释。”数感
Sense of number is a person’s logarithm of the meaning and intuitive computing, is a basic mathematical quality, is the ability to understand the number and number of applications for effective operation, is the conscious use of mathematical thinking to analyze specific issues ability. The sense of number is based on a clear concept of numbers and effective calculations and other activities, is to bridge the gap between mathematics and reality. “Mathematical Curriculum Standard (experimental draft)” pointed out: "Sense of number mainly in: the significance of understanding the number; can use a variety of ways to represent the number; in a specific context to grasp the relative size of the number of relations; can use the number To express and exchange information; to select the appropriate algorithm to solve the problem; to evaluate the result of the calculation and to explain the rationality of the result.