1. Ratios Regular Textbook Page 402-406

2. Objective I can use ratio language to describe the relationship between two quantities.

3. Ratios What is a ratio? A ratio is a comparison of two quantities. (Uses division to compare two number) It shows how many times as great one quantity is to another. The numbers in the ratio are called terms.

4. There are several ways to write ratios! TeamWinsLoses Firelands83 Keystone72 Oberlin64 There are three ways to write ratios: WordsNumbers Wins to losses8 to 3 Wins 8 losses 3 Wins:losses8:3 All three ways are read “ the ratio of blank to blank. So 8:3 is read, “the ratio of eight to three.

5. TeamsWinsLosses Firelands83 Keystone72 Oberlin64 Write a ratio: A. Keystones wins to losses 7:2 or 7 to 2 or 7/2 Write a ratio of wins to games played for Oberlin. 6 to 10 or 6:10 or 6/10

6. Write me a ratio! Teacher to students in this room. Students to teachers. Boys to girls Boys to all students.

7. Ty’s Video Collection Comedies=8, Dramas= 3 Cartoons= 2 Sci Fi=1 Describe the relationship between the drama videos and the Sci Fi videos. 3 to 1 Analyze relationships: The ratio of floor seats to balcony seats in a theater are 20:1. Does the theater have more floor seats or more balcony seats. How do you know?

8. Equivalent Ratios are? Equivalent Ratios: ratios that name the same comparison or that have the same value.

9. Equivalent Ratios You can find equivalent ratios by using table or multiplying or dividing both terms of the ratio by the same number.

10. Multiply both terms by the same number. Ratio: 3 cats to 5 dogs You can write an equivalent ratio by multiplying both terms by the same number. So multiply both terms by 2. An equivalent ratio would be 6 to 10

11. 5 n 7 35 N = What did you do to 7 to get to 35. You must do the same to 5.

12. Some more equivalent Ratios Write me an equivalent ratio: 6:21 3 9

13. You try! Write a ratio to triangle to rectangles in three ways. Write me three equivalent ratio for triangles to rectangles

14. Multi step The ratio of North American Butterflies to south American butterflies at a butterfly park is 5:3. The ratio of South American butterflies to European butterflies is 3:2. There are 30 North American Butterflies at the park. How many South American butterflies are there? How many European Butterflies are there?

15. Homework Workbook Pages 101-102 Odds