Ratio

Mathematics, Grade 5

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Study Guide Ratio Mathematics, Grade 5

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RATIOS Using Ratios Ratios are used to make a comparison between two things. Example 1: Look at the shapes above. What is the ratio of RED squares to GREEN triangles? We are comparing the number of RED squares to GREEN triangles. Answer We say: 4 to 6 (4 RED squares TO 6 GREEN triangles) We write: 4:6 Expressed as fraction: 4/6 © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Example 2: This bag of marbles contains 10 BLACK marbles, 5 PURPLE marbles, and 6 ORANGE marbles. What is the ratio of ALL the marbles to purple marbles? We are comparing the TOTAL number of marbles (all the marbles) in the bag to the number of PURPLE marbles. We need to find the total number of marbles first by adding 10 + 5 + 6 = 21 Answer We say: 21 to 5 (21, total number of marbles TO 5 PURPLE marbles) We write: 21:5 Expressed as fraction: 21/5 © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.