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【教学目标】1.让学生经历从实际问题抽象出植树问题模型的过程,通过画图、列表等方式发现并理解在非封闭线路上植树棵数与间隔数之间的关系。2.通过小组合作、交流,在理解间隔数与棵数之间关系的基础上,会应用植树问题模型解决一些实际问题,培养学生应用意识和解决实际问题的能力。3.渗透“一一对应”和“化繁为简”的数学思想方法。【教学重点】理解“植树问题(两端要种)”的特征,应用规律解决问题。
Teaching Objectives 1. Let students experience the process of abstracting tree planting problem models from actual problems, and find out and understand the relationship between the number of trees planted and the number of intervals on non-closed roads by drawing, listing, and the like. 2. Through group cooperation and exchange, on the basis of understanding the relationship between the number of seams and the number of trees, some tree planting problem models will be used to solve practical problems and develop students’ ability to apply awareness and solve practical problems. 3. Infiltration “one-to-one correspondence ” and “simplification ” mathematical thinking and method. Teaching Focus Understand the “tree planting problem (both ends of the species)” feature, the application of law to solve the problem.