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Add and subtract rational numbers

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Learn it Rational numbers are fractions and decimals that can be negative. Use a common denominator, and remember: subtracting a negative is adding.

Example: $-\frac{2}{3} - \left(-\frac{3}{4}\right)$

  1. Subtracting a negative is adding: $-\frac{2}{3} + \frac{3}{4}$.
  2. Common denominator 12: $-\frac{8}{12} + \frac{9}{12}$.
  3. $= \frac{1}{12}$.

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