新课标指出:“要让学生参与特定的数学活动,在具体情境中初步认识对象的特征,获得一些感受。”所谓感受,就是个体主动亲历或虚拟地亲历某件事并获得相应的认知情感的直接经验的活动。让学生亲身经历,这样不但有助于通过多种活动探究和获取数学知识,更重要的是学生在感受中能够逐步掌握数学学习的一般规 The new curriculum standard states: “To make students participate in specific mathematics activities and get acquainted with the characteristics of the objects in specific situations and get some feelings.” The so-called feeling is that an individual personally or personally experiences something and obtains the corresponding Direct experience of cognitive emotions. Let students experience, so that not only helps to explore and acquire mathematical knowledge through a variety of activities, more importantly, students are able to gradually grasp the general rules of learning mathematics