论文部分内容阅读
在小学数学作业批改过程中,笔者经常会看到一些令人哭笑不得的答案:“门高2厘米”“爸爸的体重是50克”“爷爷今年18岁”。究其原因,是因为学生没有建立正确的“数感”。一、数感的定义“数感主要是指关于数与数量、数量关系、运算结果估计等方面的感悟。通过数感的建立可以进一步帮助学生理解现实生活中数的意义,掌握或表述具体情境中的数量关系。”前一句侧重数感的界定,后一句侧重数感的作用。
In the primary school mathematics homework process, I often see some dumbfounding answer: “door 2 cm ” “father’s weight is 50 grams ” “Grandpa this year 18 years old ”. The reason is because the students did not establish the correct “number sense.” First, the sense of the number of sense “Sense of the number of mainly refers to the sentiment about the number and quantity, the relationship between the number of estimates of the operation results, etc. Through the establishment of number sense can further help students understand the meaning of the number in real life, to grasp or express specific The relationship between the number of situations. ”The previous sentence focuses on the definition of number sense, the latter sentence focuses on the role of a few flu.