《义务教育数学课程标准》指出:数感主要是指关于数与数量表示、数量大小比较、数量和运算结果的估计等方面的直观感觉。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。在“数与代数”的教学中,应帮助学生建立数感,发展运算能力,树立模型思想。那么,在平时的教学中应怎样培养学生的数感呢?一、在估算教学中加强方法指导,帮助学生初步形成数感估算教学在帮助学生形成数感方面具有重要作用。一方面可 “Compulsory education mathematics curriculum standards” pointed out: sense of the number of mainly refers to the number and the number of said the number of the size comparison, the number and calculation of the results of the intuitive perception. The establishment of “number sense” helps students understand the meaning of number in real life and understand or express the quantitative relationship in specific situation. In the “number and algebra” teaching, should help students build a sense of number, the development of computing power, establish the model idea. So, in normal teaching how to cultivate the sense of the number of students it? First, to strengthen the method of instruction in the teaching of instruction to help students to form a sense of mathematical estimates of teaching in helping to form a sense of number plays an important role. On the one hand