Mrs. Lofton’s 6th grade math

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Presentation transcript:

Mrs. Lofton’s 6th grade math Do Ratios Matter? 6.RP.1 Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities. Mrs. Lofton’s 6th grade math

What is a ratio? A ratio is one thing compared to or related to another thing; it is just a statement or an expression. Example : The ratio is 3:1 or 3/1 Example: Suppose there are thirty-five people, fifteen of whom are men. Then the ratio of men to women is 15 to 20.

Reading a ratio The order of the numbers in a ratio should match the order of the words in a ratio. apples to oranges

Ratios can be written in several different ways. moon to stars 1:3 1/3 Ways to write a ratio Ratios can be written in several different ways. moon to stars 1:3 1/3

Ratio as comparison Ratios can show comparisons between: part to part Red to green 1 to 2 Green to red 2 to 1

Part to whole Ratio can show a comparison between: part to whole Green to whole 2 to 3 2/3 Red to whole 1 to 3 1/3

Ratio can show a comparison between: Whole to part Whole to green 3: 2 Whole to red 3/1

Do we use ratios in real life? http://www.bbc.co.uk/skillswise/video/ratio-and-proportion After the video you will have to solve several ratio problems You will need paper and pencil Be ready to share

Can you solve? What is the ratio birds to dogs:________ to ________ What is the ratio apples to oranges______: _______ What is the ratio chairs to butterflies Write the answers three ways

Can you solve? Tom has 13 video games. 5 are action games, 2 are adventure and the rest are sports. How many sports games to action games does Tom have? Compare first part to part Next compare part to whole Lastly compare whole to part

Can you solve the problem? In Mrs. Jones’ class are 20 students. There are 12 boys and 8 girls. 7 students have brown hair, 10 have blonde hair and 3 have red hair. What is the ratio of students with blond hair to those that have red hair? Martha has 10 shirts. 3 are red and the rest are white. How many red shirts to white shirts does she have?

Don’t forget 1st graded homework check Friday!!!!!!! Textbook pages 23- 26 even Don’t forget 1st graded homework check Friday!!!!!!!