Ratios Created by Cristina Salas Leal November 20, 2007.

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Presentation transcript:

Ratios Created by Cristina Salas Leal November 20, 2007

Objective The students will gain an understanding of ratios and proportional relationships. TEKS(6.3A) Patterns, relationships, and algebraic thinking. The student solves problems involving ratios to describe proportional situations.

Math Journal Take a few moments to write the questions and answer them. What is a ratio? Describe a situation where ratios are used.

What is a ratio? A Ratio is a comparison between two things. Example - 3 apples to 4 oranges

Ways to write a ratio Words – 2 lollipops to 3 cookies Colon – 2:3

Ratios Clarissa has 4 blue marbles and 2 green marbles. What is the ratio of blue marbles to green marbles? 4 blue marbles to 2 green marbles; 4:2 What is the ratio of green marbles to blue marbles? 2 green marbles to 4 blue marbles; 2:4

Ratios Eric has a jar filled with gumballs. In the jar there are 15 white gumballs, 20 blue gumballs, 10 yellow gumballs, 12 red gumballs and 8 green gumballs. What is the ratio of yellow gumballs to blue gumballs? 10 yellow to 20 blue 10:20

Internet Websites SpyGuys created a lesson on Ratios Click here - LearnAlbertaLearnAlberta Watch Lesson 3 – Ratios Answer the questions and read along

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