Fraction Addition.

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Presentation transcript:

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 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

Try one