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Grade 5 Fractions of Amounts Worksheets

A half, a quarter or three fifths of an amount — and the amount you started with.

Every sheet below is generated fresh with a matching answer key. Pick one of the three levels, preview it, and print or download the PDF — no account, no watermark. For the other grade 5 mental maths skills, see all mental maths worksheets.

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Mental Maths · Grade 5

Grade
Topic
SkillEach skill is a different kind of question, with its own levels.
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Grade 5 · 2 pages · A4

Mental Maths Practice

Grade 5 • Fractions of Amounts • Two or more parts
Name:Date:

Find one part first, then multiply. No calculator.

  1. 1) 7/10 of 100 =
  2. 2) 4/5 of 10 =
  3. 3) 4/5 of 70 =
  1. 4) 5/6 of 30 =
  2. 5) 2/5 of 20 =
  3. 6) 9/10 of 160 =
  1. 7) 2/3 of 6 =
  2. 8) 3/10 of 90 =
  3. 9) 7/10 of 110 =
  1. 10) 7/10 of 120 =
  2. 11) 5/8 of 72 =
  3. 12) 3/10 of 60 =
  1. 13) 5/6 of 90 =
  2. 14) 5/8 of 96 =
  3. 15) 3/10 of 150 =
  1. 16) 2/3 of 27 =
  2. 17) 5/6 of 138 =
  3. 18) 3/4 of 56 =
  1. 19) 7/8 of 160 =
  2. 20) 3/8 of 144 =
  3. 21) 7/10 of 220 =
  1. 22) 3/10 of 230 =
  2. 23) 3/4 of 88 =
  3. 24) 2/5 of 40 =
  1. 25) 3/8 of 128 =
  2. 26) 3/4 of 48 =
  3. 27) 5/8 of 160 =
  1. 28) 3/5 of 90 =
  2. 29) 5/8 of 120 =
  3. 30) 3/4 of 64 =
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Page 1 of 2

Answer Key

  1. 1. 70
  2. 2. 8
  3. 3. 56
  4. 4. 25
  1. 5. 8
  2. 6. 144
  3. 7. 4
  4. 8. 27
  1. 9. 77
  2. 10. 84
  3. 11. 45
  4. 12. 18
  1. 13. 75
  2. 14. 60
  3. 15. 45
  4. 16. 18
  1. 17. 115
  2. 18. 42
  3. 19. 140
  4. 20. 54
  1. 21. 154
  2. 22. 69
  3. 23. 66
  4. 24. 16
  1. 25. 48
  2. 26. 36
  3. 27. 100
  4. 28. 54
  1. 29. 75
  2. 30. 48
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Page 2 of 2

What each level generates

Grade 5 fractions of amounts — the exact skill behind each difficulty setting, straight from the generator.

  1. Level 1Unit fractions
  2. Level 2Two or more parts
  3. Level 3Find the whole amount

Grade levels follow the progression common to most English-language curricula — not one specific national curriculum. Every level shows exactly what it generates, so you can check the fit with your own program. See the full scope & sequence →

More Grade 5 mental maths skills

Each one generates a different kind of question, with its own three levels and answer key.

Frequently asked questions

▸What mental maths topics come up in Grade 5?

Multiplying and dividing beyond the basic facts, doubling and halving two- and three-digit numbers, finding fractions of amounts such as 1/4 of 60 or 3/5 of 45, and mixed chains that use brackets and the order of operations. Six sheets cover those skills, each with its own three levels.

▸How do you find a fraction of a number in your head?

Divide by the denominator, then multiply by the numerator. For 3/5 of 45: 45 ÷ 5 = 9, then 9 × 3 = 27. Every amount on these sheets divides exactly, so the answer is always a whole number.

▸Why practise doubling and halving at Grade 5?

Because they unlock far more than they look like. Halving gives you a half, a quarter and 50% instantly, and doubling turns multiplying by 4 or 8 into two or three easy steps — both are the backbone of quick mental arithmetic later on.

▸What does the Mixed Chains sheet generate?

Two-operation chains at its middle level — 34 × 6 + 47, 468 ÷ 12 + 52 — with bracket chains below it, such as 754 − (318 + 207), where the bracket is worked first, and four numbers in a row above. Outside a bracket the multiplication or division always comes first, so no question is ambiguous, and every intermediate step stays a positive whole number.