概率问题是中学数学的重要研究对象,在培养学生分析问题、解决问题的能力以及发展学生数学应用意识、激发学生学习数学的兴趣方面起到了重要作用.但在具体的教学过程中,学生却常常因为一些概念辨识不清楚而出现错误,这些错误有时候甚至是“习惯性”的. Probability problem is an important research object in middle school mathematics, which plays an important role in cultivating students’ ability of analyzing and solving problems, developing students’ awareness of math application and stimulating students’ interest in math. However, in the process of concrete teaching, students often Errors sometimes occur because some of the concepts are not clearly identified, and sometimes they are “habitual.”