摘要 选取“三位数乘两位数”的同课异构课为教学案例,依据小学数学有效计算教学满足的基本要求,从运算情境的引入与运算对象的理解、运算思路的探究与运算方法的选择、运算原理的解析与运算法则的归纳、运算结果的总结与运算效果的评价4个方面对两节课进行了比较分析.最后得出培育小学生数学运算素养的几点启示:运算情境的创设应有利于学生对运算对象的理解;运算方法应基于计算问题解决的实际需要合理选择;算理与算法在运算中的相互关系及所起的作用应辩证看待;系统地总结与评价运算过程应为获得良好的运算成效服务. This paper reports a study of teaching cases with different designs of the lesson about the topic of three-digit numbers multiplied by two-digit numbers.based on the requirements of effective teaching of mathematical operations,we conducted a comparative analysis of the lesson with two designs on the topic according to four aspects:the introduction of the operation situation and the understanding of operation objects,the exploration of the operation idea and the selection of operation methods,the analysis of the operation principle and the induction of the operation rule,and the summary of operation results and the evaluation of the effects of operation.We gained the following insights on cultivating primary school students’mathematical competence related to operations:the creation of operational situations should be conducive to students’understanding of operational objects;the calculation method should be reasonably selected based on the actual needs of solving calculation problems;the relation and function of the calculation principle and the algorithm in operation should be treated dialectically;systematically summarizing and evaluating the operational process should foster the accuracy of operations.
出处 《数学教育学报》 北大核心 2021年第2期8-13,25,共7页 Journal of Mathematics Education
基金 2018年度教育部人文社会科学研究规划基金项目——西北民族地区农村中小学教师专业成长支持体系研究(18YJA880039)。
关键词 小学生 数学运算素养 培育 同课异构 课例比较 primary school students mathematical operation competence cultivation same lesson with different designs lesson comparison
分类号 G622 [文化科学—教育学]
