“可能性大小”演示课件2[13张PPT][冀教版八年级上].pptVIP

可 能 性 大 小 九年制义务教育人教版三年级(上) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 活动要求： （1）组长安排好摸球顺序，全组按顺序轮流摸球, 共摸20次。 （2）摸球前先摇一摇，摸出一个球就在相应 的格子里做上记号，然后把球放回盒子。 （3）统计好次数，再观察结果，小组交流： 试验结果与你的猜测一样吗？ 为什么会出现这样的结果？ （4）要求：安静、快速，摸球时不能看盒子里 的球。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 有四个小朋友为了验证结果，共摸球6095次，其中摸出黄球4260次，摸出白球1835次。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 判一判： （1）皮皮有1块红橡皮和3块绿橡皮，任意取1块， 取出绿橡皮的可能性大一些。（ ） （2）皮皮有3块绿橡皮和9块黄橡皮，任意取1块, 取出绿橡皮的可能性大一些。（ ） （3）如果皮皮有1000块紫橡皮和1块红橡皮，任意 取1块，取出的一定是紫橡皮。（ ） √ × × Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. （2）盒子里有三种玻璃球，分别是红球、蓝球、白球，（ ）球的个数可能最多，（ ）球的个数可能最少。 蓝 共摸 红球 蓝球 白球 25次 1次 18次 6次 猜一猜 红 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profi