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《数学课程标准》(2011年版)指出:在数学课程中,应当注重发展学生的数感、符号意识、空间观念、几何直观、数据分析观念、运算能力、推理能力和模型思想。而数感主要指关于数与数量、数量关系、运算结果估计等方面的感悟。建立数感有助于学生理解现实生活中数的意义,理解或表述具体情境中的数量关系。因此,让学生逐步理解数的意义,通过合理的途径来培养数感应该从低年级数学教学中开
The Mathematical Curriculum Standard (2011 Edition) points out: In mathematics curriculum, students should pay attention to the development of sense of number, symbolic awareness, spatial concept, geometric intuition, data analysis concept, computing ability, reasoning ability and model thinking. The number of senses mainly refers to the number and the number of relations between the estimated results of computing and other insights. Creating a sense of numbers helps students understand the meaning of numbers in real life and understand or express quantitative relationships in specific contexts. Therefore, to enable students to gradually understand the significance of the number, through a reasonable way to cultivate the number of senses should be from the junior mathematics teaching to open