数感是学生数学素养的重要组成部分,培养数感,这是一个教育理念的更新问题。虽然我们不必(也不可能)进行数感培养的专项训练,但教师应强化这方面的意识,结合有关教学内容,自觉地将数感培养这根无形的红线贯穿于日常教学之中。认真学习和理解数感的本质、明确数感的意义,以及研究培养数感的途径与方法十分必要。《数学课程标准》指出:“数感主要表现形式为理解数的意义,能用多种方法表示数,能在具体的情境中 Sense of number is an important part of students’ mathematical literacy, cultivating a sense of number, which is a renewal of educational philosophy. Although we do not have to (or can not) carry out specific training in the sense of number sense, teachers should reinforce their awareness in this respect and conscientiously transform the intangible red line of sense of sense into everyday teaching. It is necessary to conscientiously study and understand the nature of number sense, clarify the meaning of number sense, and to explore ways and means of cultivating number sense. ”Mathematical Curriculum Standards“ pointed out: ”number sense of the main forms of expression to understand the significance of the number can be expressed in a variety of ways, in specific contexts