提出实际问题,用所学数学知识来解决这些问题,是学习数学的最终目的.本文选题源于中学课本内容,结合实际问题,注意培养学生的应用意识. It is the ultimate goal of learning mathematics to put forward practical problems and solve these problems with the learned mathematics knowledge. This article originates from the content of middle school textbooks, combined with practical problems, pay attention to cultivate students’ application awareness.