一个数学概念从未知到已知到组织到应用是一个长期的过程。在教学中应关注学生获得数学概念的过程,给学生充分的机会和时间促使学生数学能力的发展,这就是数学教学的价值。正如新课程标准提出的“数学活动经验的积累是提高学生数学素养的重要标志,数学活动经验需要在‘做’的过程和‘思考’的过程中积淀,是在数学活动过程中逐步积累的。” It is a long-term process that a mathematical concept is unknown until it is known that organization to application. In teaching, students should pay attention to the process of obtaining mathematical concepts, give students sufficient opportunities and time to promote the development of students’ mathematical abilities. This is the value of mathematics teaching. As the new curriculum standard puts forward, “The accumulation of experience in mathematical activity is an important symbol of improving students’ mathematical literacy. The experience of mathematical activity needs to be accumulated in the course of ’doing’ and ’thinking’ and accumulating in the process of mathematics . ”