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作为新增内容之一的“负数”知识倍受教师的关注。“教学大纲”或“课程标准”对负数的要求有何变迁?不同版本的教科书是如何呈现负数内容的?负数是一个复杂的体系,它包括数的范围的扩充,有理数的运算,绝对值的教学,相反数的教学等。让学生理解正、负数的意义、掌握正、负数的概念是最基本的要求。由于考虑到数的性质符号的抽象性,我国一直将其放置初中进行教学,新一轮的小学数学课程改革将负数的部分内容放置小学教学,这绝不是初中负数教学的简单的“照搬”。
As one of the new content “negative number ” knowledge much teacher’s attention. How do different versions of textbooks have negative numbers? A negative number is a complex system that includes an expansion of the range of numbers, an operation of rational numbers , The absolute value of teaching, the opposite number of teaching. It is the most basic requirement for students to understand the meaning of positive and negative numbers and grasp the concepts of positive and negative numbers. Due to the abstraction of symbols of the nature of numbers, our country has been placing it in junior middle schools for teaching. A new round of elementary mathematics curriculum reform will place part of the negative numbers in primary schools. This is by no means a simple “copying” ".