【案例背景】随着数学课程改革的不断深入,自主探究性学习得到了越来越多的重视。它能提高学生的学习积极性,使学生真正成为学习的主人。同时,它向学生提供充分从事数学活动的机会,使他们真正理解和掌握基本的数学知识与技能,真正促使学生发现问题,提出问题。如何设计探究问题更适合学生的认知发展水平和已有的知识经验呢?笔者借助以下教 Case Background With the continuous deepening of mathematics curriculum reform, independent inquiry learning has received more and more attention. It can improve the enthusiasm of students to make students truly become masters of learning. At the same time, it provides students with the opportunity to fully engage in math activities, so that they can really understand and master basic math knowledge and skills, and really encourage students to discover and ask questions. How to design and explore the problem is more suitable for the level of cognitive development of students and existing knowledge experience? I use the following teach