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Transparency 1. Click the mouse button or press the Space Bar to display the answers. Splash Screen. Example 1-3b. Objective. Express ratios and rates in fraction form. Example 1-3b. Vocabulary. Ratio. A comparison of two numbers by division 3 to 4 3:4 3. 4. Example 1-3b.

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  1. Transparency 1 Click the mouse button or press the Space Bar to display the answers.

  2. Splash Screen

  3. Example 1-3b Objective Express ratios and rates in fraction form

  4. Example 1-3b Vocabulary Ratio A comparison of two numbers by division 3 to 4 3:4 3 4

  5. Example 1-3b Vocabulary Equivalent ratios Ratios that have the same value

  6. Example 1-3b Vocabulary Rate A ratio of two measurements having different units

  7. Example 1-3b Vocabulary Unit rate A rate that has a denominator of 1

  8. Lesson 1 Contents Example 1Write a Ratio in Simplest Form Example 2Use Ratios to Compare Parts of a Whole Example 3Find Unit Rate

  9. Example 1-1b FRUIT Write the ratio that compares the number of apples to the number of oranges. apples Set up ratio oranges Apples are listed first so will be the numerator Oranges listed second so will be denominator 1/3

  10. Example 1-1b FRUIT Write the ratio that compares the number of apples to the number of oranges. apples 8  2 oranges  2 Count how many apples and put in numerator 6 apples Count how many oranges and put in the denominator Answer: oranges = 2 Find GCF NOTE: Leave ratio in fraction form Divide GCF into numerator and denominator 1/3

  11. Example 1-1a RECREATION Write the ratio that compares the number of unicycles to the number of scooters. unicycles Answer: scooters 1/3

  12. Example 1-2a BOOKS Write the ratio that compares the number of books about sports to the total number of books. Set up ratio Sports books are listed first so will be the numerator Total books are listed second so will be the denominator 2/3

  13. Example 1-2a BOOKS Write the ratio that compares the number of books about sports to the total number of books. Count how many sports books and put in numerator sports Count how many total books and put in denominator Answer: total = 1 Find GCF 2/3

  14. Example 1-2b SPORTS Write the ratio that compares the number of basketballs to the total number of sports balls. basketballs Answer: total 2/3

  15. Example 1-3a FOOD Find the cost per ounce of a 16-ounce jar of salsa that costs $2.88. Set up ratio cost ounce Money MUST be in the numerator Cost is listed first so will be the numerator Ounce is listed second so will be the denominator 3/3

  16. Example 1-3a FOOD Find the cost per ounce of a 16-ounce jar of salsa that costs $2.88. Replace cost with $2.88 cost ounce Replace ounce with 16 ounce 3/3

  17. Example 1-3a FOOD Find the cost per ounce of a 16-ounce jar of salsa that costs $2.88. Replace cost with $2.88  16 cost ounce  16 Replace ounce with 16 ounce “Cost per ounce” refers to a unit price Answer: Divide numerator AND denominator by denominator 3/3

  18. Example 1-3b * TEMPERATURE The outside temperature rises 32 degrees in four hours. Find the temperature increase for one hour. Answer: 3/3

  19. End of Lesson 1 Assignment

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