论文部分内容阅读
“二次根式”是“数与代数”领域的重要内容。它在“平方根”的基础上展开,被开方数由数字扩展到字母,随后学习四则运算,是“实数”与“代数式”内容的延伸与扩展。笔者结合苏科版《义务教育教科书·数学》八年级上册~([1])及下册~([2])(以下简称苏科版教材)与Glencoe McGraw-Hill公司出版的美国加州教材California Algebral~([3])(以下简称CA版教材)的相关内容对本章做了一些对比分析,并获得了关于“二次根式”的教学启示,愿在此呈现,以飨读者。
The “secondary root” is an important part of the “number and algebra” field. It expands on the basis of “square root”, is expanded by numbers from numbers to letters, and then learns four operations, which is the extension and expansion of “real number” and “algebraic” contents. The author combines Suco’s “Compulsory Education Textbook Mathematics Mathematics” grade 8 ([1]) and the next volume ~ ([2]) (hereinafter referred to as the Suko version of the textbook) and California textbooks California published by Glencoe McGraw-Hill Company The related content of Algebral ([3]) (hereinafter referred to as the CA version) has made some comparative analysis of this chapter and obtained the teaching revelation about the “secondary root style”. I would like to present it here to the reader.