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Fraction Addition. ¾ + ¾ . Count the pieces. Try some. 4 / 5 + 3 / 5. Compare. Try some. Apples and Oranges. The things you add have to be the same size. Common Denominator. Common Denominator. A number all original denominators divide into evenly
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¾ + ¾ • Count the pieces
Try some • 4/5 + 3/5
Apples and Oranges • The things you add have to be the same size
Common Denominator • A number all original denominators divide into evenly • 12 is a common denominator because 3 and 4 both divide 12 evenly.
Least Common Denominator • To find the least common denominator • Write the times table list for each denominator • The smallest number that is in all rows is the least common denominator
Least Common Denominator • To find the least common denominator • Write the times table list for each denominator • The smallest number that is in all rows is the least common denominator
Try One • Find the common denominator for these fractions • A) 2/3 + 3/5 • B)¾ + 7/12 • C)2/5 + 3/8 + 7/10
Addition • Find a common denominator • Raise to the denominator • Add • Simplify
Addition • Find a common denominator • Raise to the denominator • Add • Simplify
Addition • Find a common denominator • Raise to the denominator • Add • Simplify
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