Fraction addition
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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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Slide2 l.jpg
¾ + ¾

  • Count the pieces


Try some l.jpg
Try some

  • 4/5 + 3/5




Apples and oranges l.jpg
Apples and Oranges

  • The things you add have to be the same size



Common denominator8 l.jpg
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 l.jpg
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 denominator10 l.jpg
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 l.jpg
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



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Addition

  • Find a common denominator

  • Raise to the denominator

  • Add

  • Simplify


Addition15 l.jpg
Addition

  • Find a common denominator

  • Raise to the denominator

  • Add

  • Simplify


Addition16 l.jpg
Addition

  • Find a common denominator

  • Raise to the denominator

  • Add

  • Simplify




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