近年来,随着概率试题的不断丰富与创新,出现了困扰师生的“难”题,面对出现的多解,有时对其难以分辨,究其原因是未能正确把握概率问题的相关概念,事件与事件之间的关系认识不清,理解不到位,以及在解答问题时没能针对题目依据概念仔细推敲,为了有效防止该类问题的发生,下文以课堂实录表达面对概率题目的多种解答时的辨误过程,从中吃透概念,区分本质,厘清头绪,提高解题能力.1.课堂实录题目1号箱中有2个白球和4个红球,2号箱 In recent years, with the continuous enrichment and innovation of probability test questions, “difficult” questions have plagued teachers and students. In the face of the many solutions that appear, it is sometimes difficult to distinguish them because the failure to correctly grasp the probability problem Related concepts, the relationship between events and events, unclear understanding, understanding is not in place, and in answering questions can not be based on the concept of the topic carefully considered, in order to effectively prevent the occurrence of such problems, the following expressions in the classroom to face the probability of the problem The answer to multiple errors process, from which to understand the concept of distinction between the essence, to clarify the clue, to improve the ability to solve problems.1 class record title box 1 has 2 white balls and 4 red balls, box 2