课本的习题是数学知识、解题策略和思想方法的有机结合,具有基础性、启发性、示范性,很多同学往往会认为其简单而不重视,然而很多中考试题就是在课本习题的基础上拓展演变而来,因此对课本习题的研究与应用有着重要的价值,本文以“二元一次方程组”一章中的一道课本习题为例,对练习进行一些拓展探究,供同学们学习参考.原题(苏科版教材七下第107页练一 Textbook exercises are the combination of mathematical knowledge, problem solving strategies and thinking methods. They are basic, enlightening and demonstrative. Many students tend to think that they are simple and not important. However, many of the middle school exam questions are based on textbook exercises Evolved, so the research and application of textbook exercises has an important value. In this paper, a textbook exercise in the chapter “Binary Equations” as an example, to explore some exercises to explore for students to learn The original title (Suke version of the textbook seven seventh page practice one