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How to Add and Subtract fractions with common and uncommon denominators.

BY: Julie Garcia, Ava Genovese, Yansi Rodriguez, Anna Acosta
by

Julie Garcia

on 5 October 2012

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Transcript of How to Add and Subtract fractions with common and uncommon denominators.

100 5
50 37
100 How to Add and Subtract Fractions with Common and Uncommon Denominators. Subtracting Fractions Adding Fractions 3 (common and uncommon) Uncommon denominators _ Adding Fractions 6 + Common denominators 2 _ 8 16 6 3 = 16 = 5 _ 6 81 _ 5 16 (denominators stays the same) 97 + 3 _ COMMON UNCOMMON _ + _ = (Denominator stays the same) (Find LCD) 3 _ _ 5 8 15 (find a common denominator) 3 5 = x3 x3 9 15 (multiply by 3) 9 15 8 15 = 15 1 97 = 97 _ 84 _ = _ _ = _ 2 7 1 4 2 7 28 8 1 4 28 7 x4 x4 x7 x7 8 28 _ + 7 28 _ = 28 _ 15 15 28 _ _ _ _ _ _ _ + _ _ _ _ _ = __ _ (find common denominator) _ 5
50 = x2 x2 100 10 37
100 10
100 + = 47
100 47
100 (common & uncommon) What is Adding and Subtracting fractions? 81 81 25 Adding fractions is when you have two fractions and add them together even when the denominator is the same and/or different. 4 _ + Subtracting Fractions Subtracting fractions is when you have two fractions and you subtract them. If the denominator is the same, it stays the same. If the denominator is different, you must find a common denominator = 81 29 7 BY: Julie Garcia, Yansi Rodriguez, Ava Genovese, and Anna Acosta 28 = + 3 4 7 4 find common denominator /4 /4 4
28 = 1
7 THE END!!!!!!!
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