随着科学技术的发展,概率论在社会生活实际以及科学实验和研究中都得到了越来越广泛的应用,因而成为新课程中新增的热点内容.在概率教学中,我们常会遇到一些与学生的原有认知有重大冲突的数学问题、数学方法、数学结论等,若能抓住时机对这些素材加以有效利用,不仅可以突破学生 With the development of science and technology, the theory of probability has been more and more widely used in the social practice and scientific experiments and researches, and thus has become a new hot topic in the new curriculum. In probabilistic teaching, we often encounter some Mathematical problems, mathematical methods, mathematical conclusions that have major conflicts with the students’ original cognitions can not only break through the students if they can seize the opportunity to make effective use of these materials