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Free · Class 1–5 · 3 worksheets · answer keys · practise online · set 21

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 21
Name:Date:Score:    / 20

Solve in your head.

  1. Double 5 =
  2. 2 + 10 =
  3. Double 6 =
  4. 4 + 4 =
  5. 18 − 9 =
  6. 13 − 4 =
  7. 80 + 5 =
  8. Double 9 =
  9. 5 + 2 =
  10. 16 − 8 =
  11. Double 3 =
  12. 30 + 4 =
  13. Double 1 =
  14. 8 + 7 =
  15. 10 − 2 =
  16. 20 + 3 =
  17. 20 + 2 =
  18. 6 + 8 =
  19. Double 4 =
  20. 18 − 15 =

Mental maths — Class 3

Class 3 · Worksheet 2 · set 21
Name:Date:Score:    / 20

Solve in your head.

  1. 66 + 9 =
  2. 46 + 9 =
  3. 100 − 70 =
  4. 81 × 10 =
  5. 22 + 9 =
  6. 43 + 9 =
  7. 70 + 9 =
  8. Half of 14 =
  9. 100 − 39 =
  10. Double 48 =
  11. Half of 32 =
  12. Half of 48 =
  13. 78 × 10 =
  14. 100 − 65 =
  15. Half of 96 =
  16. Double 20 =
  17. 56 + 9 =
  18. 88 + 9 =
  19. 100 − 89 =
  20. 62 × 10 =

Mental maths — Class 4–5

Class 4–5 · Worksheet 3 · set 21
Name:Date:Score:    / 16

Solve in your head. Use the tricks.

  1. 63 × 11 =
  2. 50 × 99 =
  3. 52 × 25 =
  4. 191 + 399 =
  5. 33 × 99 =
  6. 74 × 99 =
  7. 43 × 99 =
  8. 39 × 11 =
  9. 80 × 25 =
  10. 355 + 499 =
  11. 246 + 399 =
  12. 15 × 11 =
  13. 252 + 199 =
  14. 64 × 11 =
  15. 305 + 499 =
  16. 60 × 25 =

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.