Practice Adding Fractions with Unlike Denominators in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
Adding fractions with different denominators by first rewriting them with a common denominator (usually the LCD), then adding numerators.
You can't add thirds and fourths directly—it's like adding apples and oranges. Convert both to twelfths first, then add.
Example 1
easyAdd \frac{1}{3} + \frac{1}{4}.
Example 2
mediumSubtract \frac{5}{6} - \frac{3}{8}.
Example 3
mediumAdd \frac{2}{5} + \frac{3}{7}.
Example 4
hardCompute \frac{7}{10} + \frac{2}{15} - \frac{1}{6}.