中学数学教材中的例(习)题凝聚了专家、学者的集体智慧和结晶,一些看似平淡无奇的习题,往往隐藏着深远的背景,有着意想不到的功能.通过全方位、多角度对这些习题的探究,我们可以得到相关题组、题群、题链,让我们变中求进、进中求通,通中求简,从而跳出“题海”、触类旁通,进入一个崭新的天地. Examples (study) in middle school mathematics textbooks gather the collective wisdom and crystallization of experts and scholars. Some seemingly insipid exercises often hide the profound background and have unexpected functions. Through comprehensive and multi-angle analysis The exploration of these exercises, we can get the relevant group, group of questions, the title chain, let us into the progress, seek progress through, pass through the Jane, so as to jump out of “question the sea”, by the analogy, into a brand new world.