数感是一种主动、自觉的理解数和运用数及数量关系的态度与意识,简单说是感觉,深层说是感悟。正如球员要有球感、歌手要有乐感、演讲要有语感一样,数感是一项基本技能,也是重要的数学素养。在教学时需要我们引导学生去认识数,把握数量关系,进行合理的估算,从而培养学生的数感。一、在实践操作中建立数感数学来源于生活,又服务于生活。只有通过生活中的实例让学生亲自动手做一做、动口说一说、动脑想一想,才能真正理解和感悟数学知识,建立数感。数学知识具有抽象性、概括性、逻辑性等特点,只有通过生活中的实例,在实践操作中充分 Sense of number is a kind of active and conscious understanding of the number and the use of numbers and the number of relations between the attitude and awareness, simply say the feeling, deep perception. Just as a player has a sense of ball, a singer must have a sense of music, and a speech should have a sense of language. Sense of number is a basic skill as well as an important mathematical accomplishment. In teaching we need to guide students to recognize the number of grasping the relationship between quantity, make a reasonable estimate, so as to develop a sense of the number of students. First, to establish a sense of mathematics in practice comes from life, but also serve life. Only through examples of life for students to do one hand, one move, mind to think about it, to truly understand and comprehend mathematical knowledge, to establish a sense of number. Mathematical knowledge with abstract, general, logical and so on, only through the examples in life, in practice fully operational