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2-6 Ratios, Rates and Conversion

2-6 Ratios, Rates and Conversion. Definitions. Ratios Rate Cm/lbs Unit rate. Compares two numbers by division A ratio that compares quantities measured in different units Rate with a denominator of 1. Conversion factor. Ratio of two equivalent measures in different units.

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2-6 Ratios, Rates and Conversion

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  1. 2-6 Ratios, Rates and Conversion

  2. Definitions • Ratios • Rate • Cm/lbs • Unit rate • Compares two numbers by division • A ratio that compares quantities measured in different units • Rate with a denominator of 1

  3. Conversion factor • Ratio of two equivalent measures in different units

  4. Comparing Unit Rates • You are shopping for t-shirts. Which store offers the best deal? • Store A - $25 for 2 • Store B - $45 for 4 • Store C - $30 for 3 • Divide $25 by 2 to get price per shirt • Divide $45 by 4 to get price per shirt • Divide $30 by 3 to get price per shirt http://www.pearsonsuccessnet.com/snpapp/iText/products/0-13-368848-8-01/media/National/NA_SDC_A1/A1G0206_01SOP.mp4

  5. Trisha ran 10km in 2.5 h. Jason ran 7.5km in 2h. Olga ran 9.5 km in 2.25h. Who had the fastest average speed?

  6. Converting Unit Rates • How do you choose the conversion factor? • Get common units • Divide • 330 hours→ min • 330 x 1h/60min • http://www.pearsonsuccessnet.com/snpapp/iText/products/0-13-368848-8-01/media/National/NA_SDC_A1/A1G0206_02SOP.mp4 • 15kg → grams • 15kg x 1000g/1kg • 1250cm → m

  7. http://www.pearsonsuccessnet.com/content/HVT_English/academy123_content/wl-book-demo/ph-165s.htmlhttp://www.pearsonsuccessnet.com/content/HVT_English/academy123_content/wl-book-demo/ph-165s.html • http://www.pearsonsuccessnet.com/content/HVT_English/academy123_content/wl-book-demo/ph-891s.html

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