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# 10-5 Addition and Subtraction: Unlike Denominators - PowerPoint PPT Presentation

10-5 Addition and Subtraction: Unlike Denominators. Standard 13.0: Add and subtract rational expressions. Factor each expression. Form the product using each factor the greatest number of times it occurs. . Least Common Multiple Rule. #1 Finding the LCM. #2 Finding the LCM.

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## PowerPoint Slideshow about '10-5 Addition and Subtraction: Unlike Denominators' - taji

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Presentation Transcript

Standard 13.0: Add and subtract rational expressions.

Form the product using each factor the greatest number of times it occurs.

Least Common Multiple Rule

Adding and Subtracting Rules: Unlike Denominators

• Change Subtraction to Add the Opposite

• Factor the Denominator, if possible

• Find a Common Denominator (LCD)

• Multiply the Numerator and Denominator by the missing factor

• Factor the Numerator if possible

• Simplify if possible