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