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比例的意义 PowerPoint PPT Presentation


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比例的意义. 性质. 和. 执教者:徐美珍. 准备题: 在下面各比中,把相等的比用线连起来。 5︰8 4︰6 12︰20 10︰25. 1. 5. 2. 1.5︰2.5 —︰— 1︰1— 0.6︰1.5. 12. 3. 2. 例 1 有两棵树(如下图),写出它们的高度比和重量比,并求出比值。. 30 分米. 30︰36. 5 / 6. 36 分米. 50︰60. 5 / 6. 50 千克. 30︰36 = 50︰60. 60 千克.

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比例的意义

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