新课程标准明确提出:“要使学生经历运用数学符号和图形描述现实世界的过程,建立数感,发展抽象思维”。建立数感实际上是让学生会“数学地”思考问题。美国学者Grouws认为:“学会数学地思考问题就是形成数学化和抽象化的数学观点、运用数学进行预测的能力,以及运用数学工具解决现实问题的能力。”一、联系生活体验数感教师在教学中要引导学生联系自己身边具体、有趣的事物,通过观察、操作、解决问题等丰富的活动,感受数的意 The new curriculum standards clearly put forward: “To enable students to experience the use of mathematical symbols and graphics to describe the real world process, the establishment of a sense of number, the development of abstract thinking ”. Creating a sense of number actually allows students to think “mathematically.” According to Grouws, a scholar in the United States, “Learning to think mathematically is the mathematical point of view of mathematics and abstraction, the ability to use mathematics to predict, and the ability to use mathematical tools to solve real problems.” In teaching to guide students to contact their own specific, interesting things, through observation, operation, problem solving and other rich activities, feeling the number of Italy