9 5 addition subtraction and complex fractions
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9.5 Addition, Subtraction, and Complex Fractions. (p. 562). Remember : When adding or subtracting fractions, you need a common denominator!. Examples:. Example:. ** Needs a common denominator 1 st ! Sometimes it helps to factor the denominators to make it easier to find your LCD.

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Remember when adding or subtracting fractions you need a common denominator
Remember: When adding or subtracting fractions, you need a common denominator!



Example
Example:

** Needs a common denominator 1st! Sometimes it helps to factor the denominators to make it easier to find your LCD.

LCD: 3x3(2x+1)


Example1
Example:

LCD: (x+3)2(x-3)



Complex fraction a fraction with a fraction in the numerator and or denominator
Complex Fraction – a fraction with a fraction in the numerator and/or denominator.

Such as:

How would you simplify this complex fraction?

Multiply the top by the reciprocal of the bottom!


Steps to make complex fractions easier
Steps to make complex fractions easier.

  • Condense the numerator and denominator into one fraction each. (if necessary)

  • Multiply the numerator by the denominator.

  • Simplify the remaining fraction.






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