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抓“数的身份”学定律本质,助推学生运算能力提升——以“交换律”教学实践为例
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作者 蓝作坤 《数学教学通讯》 2024年第31期53-55,共3页
运算律是培养学生运算能力的一个重要环节。研究者通过紧抓“数的身份”,让学生学习有整体的交换律;辨析“数的身份”,让学生学习讲道理的交换律;显化“数的身份”,让学生学习可视化的交换律,最终助推学生运算能力的提升。
关键词 数的身份 运算律 运算能力
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Two Kinds of Series Involving the Reciprocals of Binomial Coefficients
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作者 SONG Hai-tao 《Chinese Quarterly Journal of Mathematics》 CSCD 2011年第2期306-310,共5页
By applying the theory of formal power series,the author obtains the closed forms for two kinds of infinite series involving the reciprocals of binomial coefficients,and the author gets another closed form for the inf... By applying the theory of formal power series,the author obtains the closed forms for two kinds of infinite series involving the reciprocals of binomial coefficients,and the author gets another closed form for the infinite series Σr≥m tn+r/(n+rr). 展开更多
关键词 reciprocals of binomial coefficients formal power series combinatorial identity
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