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Ratios. By Edith Henderson Beech Springs Intermediate School Grade 5 http://www.spart5.k12.sc.us/. What is a ratio?. A ratio is two numbers that are used to compare two quantities. Three Ways To Write Ratios. 1/3 1 to 3 1:3. Where Can We Find Ratios?. Recipes Food labels Classrooms

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Ratios

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Slide1 l.jpg

Ratios

By

Edith Henderson

Beech Springs Intermediate School

Grade 5

http://www.spart5.k12.sc.us/


What is a ratio l.jpg

What is a ratio?

A ratio is two numbers that are used to compare two quantities.


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Three Ways To Write Ratios

  • 1/3

  • 1 to 3

  • 1:3


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Where Can We Find Ratios?

  • Recipes

  • Food labels

  • Classrooms

  • Scale Drawings


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Let’s Make A Ratio

What is the ratio of pairs of white tennis shoes to pairs of black tennis shoes? Write the answer in three ways.


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Let’s Make A Ratio “Answer”

White pairs of tennis shoes = 5

Black pairs of tennis shoes = 4

Ratio is 5/4 or 5 to 4 or 5:4.


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Black and White Shoes

  • What is the ratio of white to black shoes?

  • What is the ratio of black to white shoes?

  • What is the ratio of black shoes to all shoes?


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Trivia Games

What is the ratio of games won by Sean to games won by Sonia on Day 3?


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Standards Addressed:Data Analysis and Probability

  • Formulate questions that can be addressed with data and collect, organize, and display relevant data to answer them.

  • Compare data sets collected in different ways to address a given question.


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