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Fractions of a Set

Grade 3 · Stretch challenge · 12 questions · Version PG-EU22UL-QNEL

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1.What is 1/3 of 21?
2.What is 2/3 of 21?
3.What is 1/8 of 16?
4.What is 2/3 of 6?
5.What is 6/8 of 16?
6.What is 2/10 of 30?
7.What is 8/10 of 30?
8.What is 1/6 of 24?
9.What is 1/2 of 18?
10.What is 7/10 of 30?
11.What is 2/3 of 15?
12.What is 4/6 of 24?

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 9
  1. What is 1/3 of 21?7
  2. What is 2/3 of 21?14
  3. What is 1/8 of 16?2
  4. What is 2/3 of 6?4
  5. What is 6/8 of 16?12
  6. What is 2/10 of 30?6
  7. What is 8/10 of 30?24
  8. What is 1/6 of 24?4
  9. What is 1/2 of 18?9
  10. What is 7/10 of 30?21
  11. What is 2/3 of 15?10
  12. What is 4/6 of 24?16

Worked example

1/3 of 12 is 4 because 12 divided into 3 equal groups gives 4 in each.

Common mistake

Multiplying by the denominator instead of dividing into equal groups.

Helpful hint

Divide by the denominator, then multiply by the numerator.