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本节课是在学习了三种事件(必然事件、不可能事件、随机事件)、概率的意义(随机事件发生可能性的大小)基础上,学习求随机事件概率的一种方法(用频率估计概率).在人教版九年级的教材中,给出了两种求概率的方法:统计概率(一般随机事件)和古典概率(有限等可能随机事件).教材中先介绍古典概率,后介绍统计概率.出于各种考虑(见课后反思),我将统计概率放在了古典概率之前进行教学,即本节课为概率初步这一章的第二课时.(第一课时为随机事件与概率的意
This lesson is based on the study of the three events (incidents, impossible events, random events), the probability of meaning (probability of random events) based on learning probability of a random event (using frequency estimation Probability). In the PEP textbook, two methods to find the probability are given: statistical probability (general random event) and classical probability (finitely possible random event). The text introduces classical probability first, and then introduces Statistical Probability. For various considerations (see Lesson Reflections), I put the statistical probability before the classical probability for teaching, that is, this lesson is the second lesson of this chapter in Probability Probability. (The first lesson is a random event Meaning with probability