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Using Ratio and Proportion to Solve Many Types (使用比和比例来解决许多类型).pdf

发布:2017-08-30约1.66万字共7页下载文档
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RATIO, PROPORTION AND PROBABILITY The student will be able to: 1. Perform basic operations and demonstrate an understanding of ratio, proportion and probability. • Write ratios—using the word “to”, with a colon, or as a fraction (e.g., 5 to 10, 5:10, 5/10) • Simplify ratios • Write equivalent ratios • Determine if two ratios are proportional • Set up a proportion to fit a situation • Cross-multiply and divide to find the unknown in a proportion • Determine when it ’s appropriate to use ratios or proportions to solve problems and set them up correctly • Predict the probability of an event • Express probability as a ratio and percent st nd • Find independent probability (1 event does not affect the 2 ) st nd • Find dependent probability (result of 1 event does affect the 2 ) 2. Apply appropriate strategies to solve word problems involving ratios, proportions, and probability. • Be able to write a ratio to show the comparison of two amounts • Correctly set up proportions to fit the situation • Set up two ratios, one with an unknown; find the unknown by
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