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所谓数感,就是一个人对数学运算的一般理解。这种理解可以帮助人们用灵活的方法作出数学判断,并为解决复杂问题提出有效的策略。在《数学课程标准》中也对此作了说明:数感主要表现在理解数的意义;用多种方法来表示数;能为解决问题而选择适当的算法;能估计运算的结果,并对结果的合理性作出解释。因此,培养学生数感是当前数学教学的一个重要任
The so-called number sense, is a person’s general understanding of mathematical operations. This understanding can help people make mathematical judgments in a flexible way and put forward effective strategies for solving complex problems. This is also explained in the Mathematics Curriculum Standard: Sense of Number is mainly manifested in understanding the meaning of numbers, expressing the number in a variety of ways, choosing the appropriate algorithm to solve the problem, estimating the result of the operation, The rationale for the result is explained. Therefore, cultivating students’ sense of number is an important task in current mathematics teaching