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Grade 5 Fractions of Whole Numbers

Grade 5 · Stretch challenge · 12 questions · Version PG-1BQB0ZW-1865

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1.What is 1/3 of 81?
2.What is 3/8 of 16?
3.What is 1/2 of 102?
4.What is 1/6 of 120?
5.What is 3/5 of 65?
6.What is 2/6 of 90?
7.What is 1/4 of 100?
8.What is 1/3 of 33?
9.What is 3/6 of 36?
10.What is 1/2 of 26?
11.What is 5/8 of 80?
12.What is 1/6 of 114?

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 6
  1. What is 1/3 of 81?27
  2. What is 3/8 of 16?6
  3. What is 1/2 of 102?51
  4. What is 1/6 of 120?20
  5. What is 3/5 of 65?39
  6. What is 2/6 of 90?30
  7. What is 1/4 of 100?25
  8. What is 1/3 of 33?11
  9. What is 3/6 of 36?18
  10. What is 1/2 of 26?13
  11. What is 5/8 of 80?50
  12. What is 1/6 of 114?19

Worked example

5/6 of 42 = 35. Divide 42 by 6, then multiply 7 by 5.

Common mistake

Multiplying before dividing and creating unnecessary large numbers.

Helpful hint

Divide by the denominator first when it divides evenly.