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数感就是认识客观事物与数时建立起来的一种意识,是人对“数”的敏锐、精确、丰富的感知和领悟。《义务教育数学课程标准(2011年版)》指出:“数感主要是指关于数与数量、数量关系、运算结果估计等方面的感悟。建立数感有助于学生理解现实生活中数的意义,理解或表述具体情境中的数量关系。”显而易见,数感来自数学活动实践,并指导数学实践活动,它的形成是一个渐进、积累的过程。教师在数学教学活动中,让学生在对数的充分感知和体验中培养发
Sense of number is to recognize the objective things and the number of times to establish a sense of people on the “number” of sharp, precise, rich perception and comprehension. “Compulsory Education Mathematics Curriculum Standard (2011 Edition)” pointed out: “Sense of the number of mainly refers to the number and quantity, the relationship between quantity, the calculation of the results of estimation, etc. The establishment of a sense of number helps students understand the meaning of real-life number , Understand or express quantitative relationships in specific contexts. ”Obviously, the sense of number comes from the practice of mathematical activity and guides the practice of mathematical practice. Its formation is a gradual and cumulative process. Teachers teach maths activities that allow students to develop their knowledge of and experience in logarithms