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Fraction Addition - PowerPoint PPT Presentation


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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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Presentation Transcript
slide2
¾ + ¾
  • Count the pieces
try some
Try some
  • 4/5 + 3/5
apples and oranges
Apples and Oranges
  • The things you add have to be the same size
common denominator8
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
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
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
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
addition14
Addition
  • Find a common denominator
  • Raise to the denominator
  • Add
  • Simplify
addition15
Addition
  • Find a common denominator
  • Raise to the denominator
  • Add
  • Simplify
addition16
Addition
  • Find a common denominator
  • Raise to the denominator
  • Add
  • Simplify
slide20

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