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西师大版小学数学第九册 蒲元小学 程贤梅 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. 把12张卡片摆成一个长方形,有多少种摆法? Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4×3=12 6×2=12 12×1=12 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4 12是4的倍数, 4是12的因数, 12也是3的倍数 3也是12的因数 × 3 = 12 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4×3=12 12是4的倍数,12也是3的倍数, 4是12的因数,3也是12的因数。 (12是4和3的倍数) (4和3都是12的因数) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 6×2=12 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 6 12是6的倍数, 12也是2的倍数 6和2都是12的因数。 × 2 = 12 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 12 12是12的倍数, 12也是1的倍数。 1是12的因数, × 1 = 12 12也是12的因数。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 为了方便,我们在研究倍数和因数 时,所说的数一般指非0自然数也就是 不是0的自然数,如1、2、3、4、5、6、 7、8、9 …… Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3 5 18 20 36 中,选择两个数,说一说谁是谁的因数,谁是谁的倍数. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 你能找出36的所有因数吗? ( ) × ( )=36 36的因数有 1 36 2 18 3 12 4 9 6 6 , 。 , , , , , , , Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 36 ÷ ( )= ( ) 你能找出36的所有因数吗? 36 ÷ ( 2 )= ( 18 ) 36 ÷ ( 3 )= ( 12 ) 36 ÷ ( 4 )= ( 9 ) 36 ÷ ( 6 )= (
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