To Add or Subtract Fractions With Unlike Denominators: 1) Write problem vertically.2) Find a common denominator.3) Add the numerators.4) Keep the same denominators.5) Simplify, if needed.

Ex.: 1/6 + 1/12 = 21/24 – 1/2 =

3/4 - 11/12 = (Same process but with negative answer.)

Ex.: 1/5 + 2/3 = (Identify largest denominator. Will the other denominator go into it? No. Multiply 5 x 2. Will 3 go into 10? No. Multiply 5 x3. Will 3 go into 15. Yes. That is your common denominator.)

5/6 + 3/4 =

4/5 + 6/7 =

3/4 - 11/12 =

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