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🍕 Fraction Lab

HK Primary 5 · Adding & subtracting fractions with different denominators

Learn · Play with it

The Fraction Bar

Drag the sliders to build two fractions. Watch the bars line up, see how we find a common denominator, and read the answer.

Fraction A 1 / 2

top a

bottom a

Fraction B 1 / 3

top b

bottom b

Practice

Answer each question, then press Check. Write each answer as a fraction (and simplify if you can). Press New questions for a fresh set.