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Halves and thirds are different-size pieces, so 1/2 + 1/3 cannot be added straight away. Change both to sixths (the LCM of 2 and 3): 3/6 + 2/6 = 5/6.
✓ You passed this lesson’s test.
LCM first — “change both fractions to the LCM of the bottoms, then add the tops”
Use it for: Adding unlike fractions in Class 5–7, recipes, distances and measurements.
🧮 Check your own sums with the free Fraction calculator — it shows the working.
Check: 5/6 − 1/3 = 5/6 − 2/6 = 3/6 = 1/2 ✓
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20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
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