4 5 goal comparing and ordering fractions
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4.5 Goal: Comparing and Ordering Fractions PowerPoint PPT Presentation


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4.5 Goal: Comparing and Ordering Fractions. Something to think about? Julie and Seth are kayaking down a river. Julie kayaks a distance of 7/10 mile, and Seth kayaks 3/4 of a mile. Who kayaked the greater distance?. Definition.

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4.5 Goal: Comparing and Ordering Fractions

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4 5 goal comparing and ordering fractions

4.5 Goal: Comparing and Ordering Fractions

  • Something to think about?

  • Julie and Seth are kayaking down a river. Julie kayaks a distance of 7/10 mile, and Seth kayaks 3/4 of a mile. Who kayaked the greater distance?


Definition

Definition

The LEAST COMMON DENOMINATOR (LCD) of two or more fractions is the least common multiple of the denominators.

When comparing two or fractions:

  • Find the LCD of the fractions

  • Use the LCD to write equivalent fractions.

  • Compare the numerators.


Example 1 comparing fractions using lcd

Example 1: Comparing Fractions Using LCD

  • To find who kayaked the greater distance we just talked about you need to compare 7/10 and 3/4


Example 2 ordering fractions

Example 2: Ordering Fractions

  • Order the fractions 2/3, 3/8, 1/6, and 3/4 from least to greatest.


Your turn

Your Turn!!!

  • Copy and complete the statement using <> or =.

  • 5/8 __ 7/12

  • 5/6__ 9/10

  • 3/14__1/4


Example 3 comparing fractions using approximation

Example 3: Comparing Fractions using Approximation

  • Use approximation to tell which fraction is greater, 13/24 or 15/34.


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