Addition 3

This quiz hands you 20 fraction addition problems built around fourths and fifths. Since those denominators share no simple factors, you spend more time hunting for a common denominator like 20, which bumps up the difficulty a notch. Sample problems include 3/4 + 1/5 and 3/4 + 3/5. Recommended for students ready to take on trickier combinations. A pattern worth catching: when both fractions sit close to a whole, like 3/4 + 4/5, the answer sails past one and you land on a mixed number almost every time.