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Lesson 66 & 67

Lesson 66 & 67. Ratio Word Problems Using Ratios to Compare. Example 66.1. The ratio of the number of parrots to the number of macaws was 5 to 7. How many macaws were there when the parrots numbered 750?. Example 66.2.

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Lesson 66 & 67

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  1. Lesson 66 & 67 Ratio Word Problems Using Ratios to Compare

  2. Example 66.1 • The ratio of the number of parrots to the number of macaws was 5 to 7. How many macaws were there when the parrots numbered 750?

  3. Example 66.2 • The ratio of the number of wrigglers to the number of squirmers was 13 to 2. When 26 students had the wriggles, how many were squirming?

  4. Unit Price • To find the unit price of an item (so you can compare brands!): • find the cost per unit weight by dividing the price by how much weight (ounces, grams, etc.)

  5. Example 67.1 • If 20 pounds of beans sold for $1.20, what was the price per pound of beans?

  6. Example 67.2 • The big can held 16 ounces and cost 80 cents. The small can held 12 ounces and cost 72 cents. Which can was the better buy?

  7. Example 67.3 • One store sold packages of 1 dozen for $1.44 a package. The other store sold packages of 3 dozen for $4.68. Use unit prices to tell which price was the best price.

  8. Homework • P.S. 67 • 1 – 30 all

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