教学目标:1通过实验操作,进一步认识客观事件发生的可能性的大小。能用分数表示可能性的大小。2经历猜测、试验、收集与分析试验结果等过程,培养学生的随机观念,体会有些事情的发生是不确定的,而不确定事件发生的可能性是有大小的。倡导“探究性学习”方式,使学生自己在教师的指导下自主地发现问题、探究问题、获得结论。3通过创设游戏情境,让学生主动参与,做数学实验,在与他人的合作过程中,增强互相帮助、团结协作的精神,重视数 Teaching Objectives: 1 Through the experimental operation, to further understand the size of the possibility of objective events. We can use fraction to indicate the possibility of possibility. 2 through the process of guessing, testing, collecting and analyzing experimental results, developing students’ stochastic concepts, realizing that some things happen are uncertain, and uncertainties are likely to occur. Advocacy “inquiry learning ” approach, so that students themselves under the guidance of the teacher to discover problems, explore the issue, to be concluded. 3 through the creation of the game situation, so that students take the initiative to participate in mathematics experiments, cooperation with others in the process of enhancing mutual assistance, solidarity and cooperation, the number