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Adding & Subtracting Fractions with Unlike Denominators Example: 1 2 + 2 5 Step 1: Find a common denominator by finding the Least Common Multiple (LCM) Multiples of 2: 2, 4, 6, 8, 10, 12, 14… Multiples of 5: 5, 10, 15, 20, 25… *They smallest multiple they have in common is 10 so this will be our common denominator. Step 2: Make your equivalent fractions. 1 2 = 5 2 10 5 = 4 10 Step 3: Add or Subtract using the equivalent fractions you found. 5 10 + 4 10 = 9 10 Step 4: Check to see if your answer is in lowest terms or if you need to reduce it. ©Jen Christensen