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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.
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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
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3. Which is larger?
3 7
Compare and . Which is larger?
4 8
http://www.shodor.org/interactivate/activities/FractionSorter/
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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
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5. 5 2 1 1 >
9 9 6 8 >
=
5 3 2 6 <
7 4 5 15
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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
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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
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8. 8