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Do Now!

Do Now! . Write each fraction in simplest form 1.) 2.) 3.) . ⅕. ⅔. DWP #14. 11/17. 10/17/2013 3-1 B Ratios. Ratios- a comparison of two quantities by division. Methods of expressing ratios. 2 to 6 2 : 6

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Do Now!

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  1. Do Now! Write each fraction in simplest form 1.) 2.) 3.) ⅕ ⅔ DWP #14 11/17

  2. 10/17/2013 3-1 B Ratios

  3. Ratios- a comparison of two quantities by division

  4. Methods of expressing ratios • 2 to 6 • 2:6 • FRACTIONS ALWAYS HAVE TO WRITTEN IN SIMPLEST FORM

  5. Example 1 Compare the number of dogs to cats using a ratio

  6. Dogs to Cats • 2 to 3 • 2:3 • SIMPLEST FORM

  7. Ex. 2 • Write the ratio in simplest form that compares the number of suns to the number of moons. Then explain its meaning.

  8. Remember to simplify! For every 2 suns, there are 3 moons.

  9. Ex. 3 Several students were asked to name their favorite kind of book. Write the ratio that compares the number of students who chose fantasy books to the total number of students.

  10. 5 1 5 ___ ___ ___ 5 25 25 ÷5 = ÷5 That means one out of 5 students chose Fantasy books. fantasy responses total responses Simplify the ratio. fantasy responses total responses

  11. Class Survey • Favorite Activity

  12. Ex. 4 Matt is volunteering for the local food bank. He wants to divide 35 cans of food into two groups so that the ratio is 3 to 4. Step 1 Use a bar diagram. Step 2 There are 7 equal sections. So, each section represents 35 ÷ 7 or 5 cans. There are 15 cans of food in the first groupand 20 cans of food in the second group.

  13. Exit Ticket

  14. 1.) 2.) A pet store sold the animals listed in the tablein one week. Write the ratio that compares thenumber of gerbils sold to the number of birds sold. Write the ratio in simplest form that compares the number of soccer balls to the number of baseballs. Then explain its meaning.

  15. Homework • Pg. 153 #1-24 Evens • Ch. 2 Quiz Corrections are due TOMORROW!

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