Adding and Subtracting Rational Expressions Focus on Algebra 2 Mrs. Sinisko

REVIEW from middle school….. Least common multiple (LCM) The LCM is the product of all different factors from each number, with each factor raised to the greatest power that occurs in any of the numbers.

Find the LCM: 1. 45, 27 2. 40, 100

Find the LCM: 3.

Find the LCM: 4.

Review of Adding and Subtracting Fractions 1. 2. 3.

Rule _______________________________ are needed when adding and subtracting fractions. LCD is the same as LCM!!!

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