《义务教育数学课程标准》在基础理念中指出:“数学教学活动应激发学生的积极性,向学生提供充分从事数学活动的机会,帮助他们在自主探究和合作交流中真正理解和掌握基本的数学知识与技能、数学思想和方法,获得广泛的数学活动经验。”这就需要教师在课堂教学中大胆放手,使学生在动脑、动眼、动手、动口主动地获取知识的过程中发展能力。 The standard of compulsory education mathematics curriculum states in the basic idea: “Mathematics teaching activities should stimulate the enthusiasm of students and provide students with opportunities to fully engage in mathematical activities to help them truly understand and master basic mathematics in their own exploration and cooperation and exchange. Knowledge and skills, mathematical ideas and methods, and gain a wide range of experience in math activities. ”This requires teachers to boldly let go of the classroom teaching so that students can develop their abilities in the process of moving their minds, moving their eyes and hands and gaining knowledge actively .