教学内容:人教版小学数学五年级上册第50—51页。教学目标:1.学生在多维互动中,综合运用已学知识,探讨事件发生的可能性大小。2.学生在亲历观察、猜想、实验、验证的学习过程中,初步获得一些数学活动的经验。3.体会数学与现实生活的联系,体验数学的应用价值。教学重点:理解事件发生的可能性有大有小。教学难点:找出不确定事件中存在的规律。教学过程一、激趣引入,设置悬念 Teaching content: PEP primary school mathematics grade fifth volumes 50-51 pages. Teaching Objectives: 1. Students in the multi-dimensional interaction, the integrated use of knowledge has been learned to explore the possibility of the size of the incident. 2. Students in the experience of observation, conjecture, experiment, verification of the learning process, preliminary experience of some mathematical activities. 3. Experience the connection between mathematics and real life, to experience the value of mathematics. Teaching Points: There is a good chance of understanding what happened. Difficulties in teaching: to find out the law of the existence of uncertain events. First, the process of teaching interest introduction, set suspense