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数感主要表现形式为:“理解数的意义;能用多种方法表示数;能在具体的情境中把握数的相对大小关系;能为解决问题而选择适当的算法;能估计运算的结果,并对结果的合理性做出解释。”数感的形成是一个渐进、沉淀、积累的过程。教师应在数学教学活动中,提供合理的情境,让学生在体验、操作、比较、交流、解决问题中,加强对数的感知、感应和感受,发展学生的数感。
Sense of the number of the main manifestations: “to understand the significance of the number; can use a variety of ways to represent the number; in a specific context to grasp the relative size of the number of relations; can solve the problem and choose the appropriate algorithm; can estimate the results of the operation , And explain the rationality of the result. ”The formation of number sense is a gradual, sedimentation, accumulation process. Teachers should provide a reasonable situation in mathematics teaching activities so that students can experience, operate, compare, exchange and solve problems, and enhance the sense, feeling and feeling of logarithm, and develop the sense of number of students.