一、教材依据西师大版数学第七册第八单元第一课时二、设计思想可能性是在本套教科书中首次出现的内容,它将为学生以后学习概率的知识作准备。对于不确定现象的认识,学生在生活中有一些体验,已有一定的生活经验和认知基础。如抛硬币、转转盘、 First, the textbook based on the Western Division of Mathematics seventh book eighth unit first hour two, the possibility of design ideas is the first textbook in this set of content, it will prepare students for the knowledge of probability to learn. For the understanding of the phenomenon of uncertainty, students have some experience in life, have a certain life experience and cognitive basis. Such as tossing coins, turn the plate,