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估算作为“数与代数”的新增内容,给计算教学输入了新鲜空气,也给我们一线教师带来了新的挑战。估计和估算作为一种十分重要的能力和算法,在数学解题和生活实践中都有着广泛的应用。但在实际的教学中,往往有较多的问题,从而给学生增加了不必要的负担。问题一:爸爸,这样估算是不是太危险了?人教版实验教材二年级上31页,教材第一次安排了“加减法估算”。教材首先出示了这样一道题:妈妈
Estimation as a new addition to “Number and Algebra”, which brings fresh air to computing teaching, also brings new challenges to front-line teachers. As a very important ability and algorithm, estimation and estimation have a wide range of applications in mathematical problem solving and life practice. However, in practical teaching, there are often more problems, thus giving students an unnecessary burden. Question 1: Dad, this estimate is not too dangerous? PEP textbooks on the second grade of 31 pages, textbooks for the first time arranged for “addition and subtraction estimation.” Textbook first produced such a question: Mom