Adding and subtracting fractions with unlike denominators

Adding or subtracting fractions with different bottom numbers (denominators), like 1/2 + 1/3, means first rewriting them with a shared denominator so the pieces are the same size: 1/2 becomes 3/6 and 1/3 becomes 2/6, so 1/2 + 1/3 = 3/6 + 2/6 = 5/6.

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