论文部分内容阅读
《义务教育数学课程标准(2011年版)》对于估算有明确的要求,即“理解估算的意义”“会用方格纸估计不规则图形的面积”。很多教师认为估算是在不要求精确计算的情况下使用的一种能快捷求出近似结果的计算方法,或者是检验精算结果是否正确的验算方法。但是他们没有意识到,估算更重要的功能在于培养学生的数感、观察能力、空间想象能力和逻辑推理能力。一、教材中对曲线图形面积的估算江苏教育出版社小学数学教材五年级上册第22页有这样一
“Mathematical Curriculum Standards for Compulsory Education (2011 Edition)” There is a clear requirement for the estimation, that is, “to understand the meaning of the estimate ” “will use the squared paper to estimate the area of irregular graphics ”. Many teachers think that estimation is a calculation method that can be used to find approximate results without exact calculation or check the correctness of actuarial results. However, they do not realize that the more important function of estimation lies in cultivating students’ sense of number, observation ability, space imagination ability and logical reasoning ability. First, the textbook in the calculation of the area of the curve graph Jiangsu Education Publishing House, the fifth grade primary school mathematics textbook on page 22 there is such a