所谓数感是一个人对数与运算的一般理解。《数学课程标准》也将数感的表现形式进行了具体的阐述,并把培养学生的数感作为义务教育阶段数学教育的一项重要目标。由此可见培养学生数感的重要性。而且,良好的数感可以帮助学生用灵活的方法做出数学判断和为解决 The so-called number sense is a person’s logarithm and operation of the general understanding. Mathematical Curriculum Standard also expounds the expression of number sense, and regards the sense of number of students as an important goal of mathematics education in compulsory education. This shows the importance of cultivating a sense of number of students. Moreover, a good sense of number can help students to use mathematical methods to make flexible judgments and solutions