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《数学课程标准》指出,数感的主要表现形式为: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;能用数来表达和交流信息;能为解决问题而选择适当的算法;能估计运算的结果,并对结果做合理性的解释。但是,现在的小学生,尤其是低年级学生对于数的意义理解不清,他们经常会犯一些可笑而又滑稽的错误,如:小明的身高是145米,书包重100千克……若要改变这种状况,我们必须要重视学生数感的培
Mathematical Curriculum Standards states that sense of numbers is mainly manifested in: understanding the meaning of numbers; expressing the number in a variety of ways; grasping the relative size of numbers in concrete contexts; using numbers to express and exchange information; Can choose the appropriate algorithm to solve the problem; Can estimate the result of the operation, and make a reasonable explanation of the result. However, nowadays primary school students, especially those in lower grades, can not understand the meaning of numbers. They often make ridiculous and funny mistakes such as: Xiao Ming’s height is 145 meters and the bag weighs 100 kilograms ... To change this Kind of situation, we must pay attention to the number of students training