To compare fractions you can draw a picture or use the “Butterfly” method.

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Presentation transcript:

To compare fractions you can draw a picture or use the “Butterfly” method.

< Draw a picture Use >, <, or =.

910< < “Butterfly” method

Use >, <, or = > > “Butterfly” method

To order fractions you can draw a picture or use the Least Common Denominator (LCD).

Draw a picture Order : least to greatest

Order the fractions from least to greatest.,,

One way to compare or order fractions is to express them with the same denominator.

Any common denominator could be used. But the Least Common Denominator (LCD) makes the computation easier.

The Least Common Denominator is the Least Common Multiple of the denominators. LCD = LCM

Use LCD List the fractions in order from greatest to least.

Use LCD Step 1: Find the LCM of the denominators

6, 12, 18, 24, 30, 36, 42, 48… LCD = 36 Find the LCD: 12, 24, 36, 48 … 9, 18, 27, 36, 45 … 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36 …

Step 2: Write equivalent fractions. 36 x x x x 12 24

G L Step 3: Compare the numerators

Use LCD In order from greatest to least: