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Fractions of a Set

Grade 3 · On-level practice · 12 questions · Version PG-1MHA6JX-YPJG

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1.What is 1/10 of 20?
2.What is 2/5 of 15?
3.What is 2/3 of 18?
4.What is 3/6 of 12?
5.What is 1/2 of 8?
6.What is 5/6 of 12?
7.What is 1/6 of 18?
8.What is 2/3 of 21?
9.What is 2/6 of 12?
10.What is 2/4 of 20?
11.What is 4/5 of 15?
12.What is 4/5 of 10?

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 10
  1. What is 1/10 of 20?2
  2. What is 2/5 of 15?6
  3. What is 2/3 of 18?12
  4. What is 3/6 of 12?6
  5. What is 1/2 of 8?4
  6. What is 5/6 of 12?10
  7. What is 1/6 of 18?3
  8. What is 2/3 of 21?14
  9. What is 2/6 of 12?4
  10. What is 2/4 of 20?10
  11. What is 4/5 of 15?12
  12. What is 4/5 of 10?8

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.