td. 9.两张这样的桌子拼在一起,可以怎样拼?面积和周长分别是多少? 6分米 4 分米周长: 面积: 8×6= 48 (平方分米) (8+6)×2= 28 (平方分米) 8 分米 12分米周长: 面积: 12 ×4= 48 (平方分米) ( 12 +4)×2= 32 (平方分米) Evaluation only. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 10. 笑笑家的厨房要地砖,有两种地砖。(1) 用第一种地砖正好需要 180 块,你知道这个厨房的面积是多少吗? (2) 用第二种地砖需要多少块? (3) 用哪种地砖比较便宜? 2×2=4(平方分米) 4× 180 = 720 (平方分米) 3×2=6(平方分米) 720 ÷6= 120 (块) 5× 180 = 900 (元) 7× 120 = 840 (元) >第二种便宜。 Evaluation only. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd.
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