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新课标将估算作为一种伴随精确计算而存在的一种常见的计算方法,是具有技巧性和生活性的一种数学方法。在倡导“学有用有活力的数学”的教学理念下,估算值得青睐。增强小学生的估算意识,让小学生掌握一些简单的估算方法对帮助他们学会运用数学的思维方式去观察、分析现实社会,解决日常生活中的问题,从而培养他们的数感及数学运用意识有积极的意义。一、走近生活,亲身体验估算的便捷与价值实际上,估算作为一种重要的数学思想方法和数学能力在我们日常生活中随处可见,应用也极为广泛,关键是有没有细心发现。一开始接触到估算,如果感受不到它的实用价值的话,学生就会觉得学习估算用处不大。要想强化学生的估算意识,培养
The New Curriculum Standard makes estimation as a common calculation method that comes with accurate calculations. It is a mathematical method with skill and life. In advocating “learning useful and dynamic mathematics ” teaching philosophy, the estimation is favored. To enhance pupils’ sense of estimation, enable pupils to master some simple methods of assessment to help them learn to use mathematical thinking to observe and analyze the real world and to solve problems in their daily life so as to cultivate their sense of number and their positive use of mathematics significance. First, approaching life, to experience the convenience and value of estimation In fact, estimation as an important mathematical method and mathematical ability in our daily life can be seen everywhere, the application is also very extensive, the key is not carefully discovered. From the very beginning, if you do not feel the practical value of it, you will find it difficult to estimate your learning. In order to strengthen the students’ assessment awareness, training