初中阶段学习概率要学会列举事件出现的所有可能,可学生每每到此,经常思绪不清,混乱不堪,对于何时列表,何时画树状图,怎么画,都不甚明了。为了扫清学生学习概率时的障碍,我在教学实践中总结出一点儿办法,可以使学生条清理晰,实现难点突破,能够解决概率问题。一、方法总结对于概率问题只要从三个方面分析透彻,任何概率难题便可迎刃而解。一是分析实验次数:如果实验一次,直接写出符 The probability of junior high school learning to enumerate all the possible occurrence of events, students often do, often confused, chaotic, when the list, when to draw a tree map, how to paint, are not very clear. In order to clear the obstacles when students learn probability, I summed up in the teaching practice a little way, you can make students clear, difficult to achieve breakthroughs, to solve the problem of probability. First, the method summary As long as the probability of the problem from three aspects of thorough analysis, any probability problems can be solved. First, analyze the number of experiments: If the experiment once, write directly symbols