读了《中小学数学》(初中版)2016年第5期李俊芳的《从三分到一统》,(以下简称文1)受李老师探究精神的鼓舞,对文中变式题的解法作了深入研究,发现了这个变式中三个问题间的本质联系,得到一种非常自然的解法.同时在培养学生的解题技能,感受数学思想方法,积累解题经验,认知数学模型,建立图形模块方面有着独特的作用.现将这种解法以及思考过程呈现于后,以飨读者. Read “primary and secondary mathematics” (junior high school edition) in 2016 fifth issue of Li Junfang “from thirds to unification” (hereinafter referred to as the text 1) inspired by the spirit of Li’s exploration of the text in the solution to the problem Researching and discovering the essential connection between the three problems in this variant and getting a very natural solution.At the same time, we should cultivate students’ problem-solving skills, experience mathematical thinking and methods, accumulate problem-solving experience, recognize mathematical models and establish graphics Module has a unique role. Now this solution as well as thinking process is presented later, in order to readers.