Chapter 18 Proportional Reasoning - PowerPoint PPT Presentation

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kristina sims n.
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Chapter 18 Proportional Reasoning

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  1. Kristina Sims Chapter 18Proportional Reasoning

  2. This is a ____________ drawing.

  3. At the park, there are 24 children playing and 20 of them are wearing blue jeans. The remaining children playing are not wearing blue jeans. • If I say “For every five children that are wearing blue jeans, there is one not wearing blue jeans.” • This statement shows an additive/multiplicative relationship.

  4. At the park, there are 24 children playing and 20 of them are wearing blue jeans. The remaining children playing are not wearing blue jeans. • If I say, “There are 16 more children wearing blue jeans than children not wearing blue jeans.” • This statement shows an additive/multiplicativerelationship.

  5. I am a good way to organize information and I show how two variable quantities are related. What am I?

  6. The ratio of green marbles in the bag to the total number of marbles in the bag. • This is what type of ratio?

  7. A proportion is…

  8. A ratio is…

  9. A rate is…

  10. This is developed through activities involving comparing and determining the equivalence of ratios and solving proportions in a wide variety of problem-based contexts and situations without recourse to rules or formulas…

  11. Instead of first introducing algorithms, teachers should encourage these…

  12. A ratio of two measures in the same setting is a _____________ ratio.

  13. A ______________ ratio is a ratio of two corresponding measures in different situations.

  14. The ratio of the number of yellow marbles to the number of orange marbles in the bag. • What type of ratio is this?

  15. 36:4 • 27:3 • These are ______________ _________.