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“用字母表示数”是苏教版教材五年级上册第八单元的内容,本节课是小学代数学习的起始课。从认知的角度来说,这是一次数的认识上的跨越,由具体的、确定的数过渡到用字母表示抽象的、可变的数。从数学思想方法的角度来看,则是小学阶段感悟代数思想的开始。无锡市新区实验小学的蔡静、孙红志两位老师和无锡市东林小学的王青老师在对教材深入解读的基础上,抓住了代数知识的数学本
“The number of letters ” is the content of the eighth unit of the fifth grade of the Su educational textbook, this lesson is the initial lesson of elementary algebra learning. From a cognitive point of view, this is a one-time epistemic leap forward from a specific, definite number to an alphabetically abstract, variable number. From the perspective of mathematical thinking and method, it is the beginning of sentiment algebra thought in primary school. Based on the in-depth interpretation of teaching materials, Cai Jing and Sun Hongzhi two teachers from Wuxi Experimental Primary School of Wuxi City and Wang Qing from Donglin Primary School in Wuxi City seized the mathematical book of algebraic knowledge