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概率是新课程标准下数学教材中涉及一个重要的知识点,它密切联系生活与现实世界,使数学情景新颖别致丰富多彩,常与几何、函数、方程等知识点交汇渗透,概率的考查已经由考概念、计算向考实际应用、阅读理解、判断说理转变.本文摘取近年中考试题为例予以分类解析,旨在探究解题方法提供解题规律.一、以方程根的情况为制约条件的概率问题例1有四张卡片(背面完全相同),分别写有数字
Probability is an important knowledge point involved in the mathematics textbook under the new curriculum standard. It closely relates to life and the real world, makes the mathematics scene novel and colorful, and often interferes with the knowledge, such as geometry, function and equation. The probabilistic examination has been done by The concept of the test to calculate the practical application of the test, reading comprehension, judging the transformation of the reason.This paper extracts the middle school exam questions in recent years as an example to be classified analysis, to explore the problem-solving method to provide problem-solving rules. First, the root of the equation as a constraint condition PROBABILITY PROBLEM Example 1 has four cards (the back is exactly the same), each with a number