Objective: I can add and subtract fractions with the unlike denominators.

When adding or subtracting fractions with unlike denominators

Step 1: Find the lowest common denominator

Step 2: Find the equivalent fraction(s).

Step 3: Add or subtract the fractions

Step 4: Simplify the answers

(Think of the lowest common denominator as the smallest multiple that they have in common.)

Read Adding Fractions if you need to learn about adding and subtracting fractions.

Try Adding Fractions Worksheets first if you need an interactive step-by-step guide to adding and subtracting fractions.

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

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