一、活动背景荷兰数学教育家弗赖登塔尔说:“数学学习是一种活动,这种活动与游泳、骑自行车一样,不经过亲身体验,仅仅靠看书本、听讲解、观察他人的演示是学不会的.”我们的新课程标准中也提出了“基本活动经验”的新目标.其中还具体指出“学生应当有足够的时间和空间经历操作、观察、模仿、实验、猜想、验证等活动过程”.所以说“动手实践”也是学习数学的一种重要方式.二、实验目的 First, the background of the activity Dutch mathematics educator Freundhal said: “Mathematics learning is an activity, such activities and swimming, riding a bike, without going through personal experience, just reading books, listening to explain, observe others The demonstration will not learn. ”“ Our new curriculum standard also sets forth a new goal of ”basic experience.“ It also specifically states that ”students should have enough time and space to operate, observe, imitate, Experiments, guesses, validation and other activities “. So ” hands-on practice "is also an important way to learn mathematics. Second, the purpose of the experiment