新课改以来,情境引入、问题驱动成为数学教学的重要模式.借助学生的生活经验创设适当的情境,为学生思考问题提供导向,这样的教学方式降低了学生学习的难度,激发了学生的动机,促进知识的生成与学习.同样,适当的问题会激发动机,引出重要概念,引导学生做出不同的表征,连接不同的内容,掌握一些特殊技能与思维策略,养成应用数学的意识与习惯,体验成就感.因此,情境创 Since the new curriculum reform, situation introduction and problem-driven have become important models in mathematics teaching.Using the students’ life experience to create appropriate situations and provide guidance to students’ thinking problems, this teaching method reduces the difficulty of student learning and stimulates students’ motivation Similarly, appropriate questions motivate, lead to important concepts, guide students to make different representations, connect different content, master some special skills and thinking strategies, to develop the awareness and habits of applied mathematics , Experience the sense of accomplishment. Therefore, the situation created