论文部分内容阅读
20以内数的进位加法,是学习20以内数的减法的基础,也是学习多位数计算的奠基石,准确而快速地进行20以内的加减法,在整个小学计算领域中,有着四两拨千斤的作用。如何搞好“20以内数的进位加法”的教学,笔者进行了深入探究。一、教法探究教学时,首先选取学生熟悉的生活素材,借助学生已有的生活经验和知识基础,让学生自主操作学具,探索口算方法及算理,经历知识的生成过程,体会解决问题策略的多样化,感知
Within 20, the carry addition is the basis for learning the subtraction within 20 and also the cornerstone for learning multi-digit calculations. The accurate and rapid addition and subtraction within 20 can play a significant role in the calculation of primary schools. How to do a good job, “20 additions within the number of addition” teaching, the author conducted in-depth exploration. First, teaching method of teaching inquiry, first select the students familiar with the material, with the students’ existing life experience and knowledge base, allowing students to operate their own tools, to explore the calculation method and calculation, experience the process of knowledge generation, experience to solve the problem Strategy diversification, perception