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Free · Class 1–5 · 3 worksheets · answer keys · practise online · set 9

Mental maths worksheets — Class 1 to 5, with answers

Free mental maths worksheets for Class 1 to 5: quick sums, doubles and halves, × 10, × 5, × 11, × 25, × 99 tricks — solve in your head, new numbers every set.

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🧠 The worksheets

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Mental maths — Class 1–2 (Class 1–2)Mental maths — Class 3 (Class 3)Mental maths — Class 4–5 (Class 4–5)

Mental maths — Class 1–2

Class 1–2 · Worksheet 1 · set 9
Name:Date:Score:    / 20

Solve in your head.

  1. 15 − 1 =
  2. 5 + 7 =
  3. 30 + 2 =
  4. Double 4 =
  5. 3 + 8 =
  6. 7 + 9 =
  7. 10 + 7 =
  8. 50 + 1 =
  9. 2 + 7 =
  10. 10 − 6 =
  11. 3 + 2 =
  12. 6 + 4 =
  13. 11 − 8 =
  14. 50 + 7 =
  15. 30 + 8 =
  16. 9 + 9 =
  17. 8 + 8 =
  18. 11 − 5 =
  19. 9 + 8 =
  20. 30 + 9 =

Mental maths — Class 3

Class 3 · Worksheet 2 · set 9
Name:Date:Score:    / 20

Solve in your head.

  1. Half of 86 =
  2. Double 20 =
  3. 100 − 84 =
  4. 100 − 47 =
  5. 60 + 9 =
  6. 100 − 19 =
  7. Half of 42 =
  8. 77 × 10 =
  9. 100 − 33 =
  10. 94 × 10 =
  11. 34 + 9 =
  12. Half of 18 =
  13. 11 × 10 =
  14. Half of 96 =
  15. 44 + 9 =
  16. 29 × 10 =
  17. Double 45 =
  18. 59 + 9 =
  19. 100 − 49 =
  20. Double 41 =

Mental maths — Class 4–5

Class 4–5 · Worksheet 3 · set 9
Name:Date:Score:    / 16

Solve in your head. Use the tricks.

  1. 102 + 299 =
  2. 78 × 5 =
  3. 29 × 99 =
  4. 60 × 25 =
  5. 71 × 99 =
  6. 54 × 5 =
  7. 64 × 11 =
  8. 88 × 25 =
  9. 41 × 11 =
  10. 454 + 199 =
  11. 58 × 5 =
  12. 80 × 99 =
  13. 100 × 25 =
  14. 40 × 5 =
  15. 44 × 5 =
  16. 57 × 99 =

More worksheets

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Questions

How can I improve my child’s mental maths?

Ten minutes a day: one sheet, timed, then check. Learn the tables and the tricks above, and try the TalentJR mental maths course.

Are these worksheets free?

Yes — print them or save as PDF free. Every worksheet has an answer key.

How do I get different questions?

Press “🔄 New set” — the questions change (maths numbers are new every time; English sentences are shuffled).

How do I print only one worksheet?

Press “🖨️ Print” on that worksheet. Tick “with answer key” if you want the answers on a second page.

Can my child do this worksheet online, like a quiz?

Yes — press “▶️ Practise online” on any worksheet. The questions come one at a time with instant marking, a score at the end and a review of mistakes. No sign-in is needed.