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Grade 5 Fractions of Whole Numbers

Grade 5 · Stretch challenge · 12 questions · Version PG-KIF3J1-1865

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1.What is 3/8 of 80?
2.What is 4/5 of 35?
3.What is 4/6 of 114?
4.What is 1/3 of 108?
5.What is 4/5 of 55?
6.What is 5/8 of 40?
7.What is 8/10 of 70?
8.What is 2/5 of 10?
9.What is 3/5 of 110?
10.What is 1/4 of 28?
11.What is 7/8 of 32?
12.What is 5/8 of 120?

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 16
  1. What is 3/8 of 80?30
  2. What is 4/5 of 35?28
  3. What is 4/6 of 114?76
  4. What is 1/3 of 108?36
  5. What is 4/5 of 55?44
  6. What is 5/8 of 40?25
  7. What is 8/10 of 70?56
  8. What is 2/5 of 10?4
  9. What is 3/5 of 110?66
  10. What is 1/4 of 28?7
  11. What is 7/8 of 32?28
  12. What is 5/8 of 120?75

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.