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小学阶段涉及的运算主要有加法、减法、乘法、除法,理解这四种运算的本质意义,是学生进行正确运算的基础。小学生的思维特点以具体形象思维为主,逐渐向抽象逻辑思维过渡。因此,运算意义的抽象,仍然要借助具体直观的辅助手段。教学情境就是一种数学抽象的具体化依托,它是以直观方式再现静态知识所表征的实际事物或者相关背景,便于引导学生处理好运算过程中的形象与抽象、感性与理性的关系。当学生在情境中学习时,能够
The operations involved in primary school mainly include addition, subtraction, multiplication and division, and understanding of the essential meaning of these four operations, which are the basis for students to carry out the correct operation. The thinking characteristics of primary school students are mainly based on specific image thinking, and gradually transition to abstract logical thinking. Therefore, abstract abstraction of the meaning of the operation still needs specific and visual aids. Teaching situation is a kind of math abstraction relying on concrete. It recreates the actual things or related background represented by static knowledge in an intuitive way, so as to guide students to deal with the relationship between image and abstraction, sentiment and rationality in computing. When students learn in context, they can