数感是人的一种基本数学素养,是人对客观世界量化的感悟,对于人的发展有重要的意义和作用。我们要在生活中不断累积数感,在课堂上不断体验数感,在活动中不断探索数感,在估算中不断强化数感。因此,数感的培养不是一蹴而就的,教师应在教学过程中,让学生自主去感知、发现、探索、强化数感。 Sense of a few people is a basic mathematical quality, is the human perception of the objective world of quantification, for human development has an important significance and role. We need to accumulate a sense of number in our daily lives. We constantly experience the sense of number in the classroom. We constantly explore the sense of number during the activity and continuously strengthen the sense of number in our estimation. Therefore, the number of flu training is not accomplished overnight, teachers should be in the teaching process, allowing students to autonomously perceive, discover, explore, enhance the number of flu.