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# 5.5 Ordering Fractions

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### 5.5 Ordering Fractions

1. 1. Mr. Williams 5.5  Ordering Fractions GESD jwilliams@gesd40.org http://mrwilliams.edublogs.org Image: 'Fractional Hugs and Kisses' www.flickr.com/photos/84617037@N00/60431147 Objective: Compare and order fractions. 1
2. 2. Vocabulary Least Common Denominator (LCD)  ­  the least common multiple of the  denominators of two fractions. Image: 'Chairs' www.flickr.com/photos/46555636@N00/2981776 2
3. 3. Which is larger? 3 7 Compare              and          . Which is larger? 4 8 http://www.shodor.org/interactivate/activities/FractionSorter/ 3
4. 4. Comparing Fractions using the LCD. 5 7 Compare           and         . 6 9 1. Find the LCD: The LCD of 6 and 9 is 18. 5 5 x 3 15 7 7 x 2 14 = 18 6 = 6 x 3 = 18 9 = 9 x 2 Which is bigger? 15        14 or 18        18 4
5. 5. 5         2 1        1 > 9         9 6        8 > = 5        3 2         6 < 7        4 5        15 5
6. 6. Ordering Fractions  3 2 1 Order the fractions        ,        ,         from least to greatest.4 10 5 1. What is the LCD of 10, 5, and 4?      Your right, it's 20! 2. Make equivalent fractions using 20 as the denominator.  3  x 2        6 = 10 x 2       20 2   x 4       8    = 5   x 4      20 1   x 5        5 = 4   x 5       20   6
7. 7. Order the following fractions from least to greatest in your math notes! 3       2      5 5      3       7 4       3      8 9      4      12 7
8. 8. 8