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Free · Class 1–5 · 3 worksheets · answer keys · practise online · set 20

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 20
Name:Date:Score:    / 20

Solve in your head.

  1. 7 + 3 =
  2. 16 − 12 =
  3. 12 − 10 =
  4. 19 − 12 =
  5. 9 + 2 =
  6. 70 + 9 =
  7. Double 6 =
  8. 15 − 9 =
  9. 19 − 2 =
  10. 30 + 5 =
  11. 9 + 6 =
  12. 18 − 12 =
  13. 10 + 9 =
  14. 80 + 4 =
  15. 90 + 8 =
  16. Double 9 =
  17. 8 + 10 =
  18. 11 − 8 =
  19. 17 − 5 =
  20. 12 − 9 =

Mental maths — Class 3

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

Solve in your head.

  1. 81 + 9 =
  2. 29 × 10 =
  3. 79 + 9 =
  4. 17 × 10 =
  5. Half of 84 =
  6. Half of 92 =
  7. Half of 90 =
  8. 65 × 10 =
  9. Double 44 =
  10. Half of 16 =
  11. Double 15 =
  12. 48 × 10 =
  13. 87 × 10 =
  14. 83 + 9 =
  15. Half of 24 =
  16. 100 − 32 =
  17. 73 + 9 =
  18. Half of 56 =
  19. 100 − 71 =
  20. Double 23 =

Mental maths — Class 4–5

Class 4–5 · Worksheet 3 · set 20
Name:Date:Score:    / 16

Solve in your head. Use the tricks.

  1. 211 + 299 =
  2. 92 × 99 =
  3. 56 × 99 =
  4. 42 × 99 =
  5. 44 × 5 =
  6. 36 × 25 =
  7. 14 × 5 =
  8. 321 + 299 =
  9. 96 × 25 =
  10. 87 × 11 =
  11. 84 × 25 =
  12. 89 × 11 =
  13. 28 × 11 =
  14. 120 × 5 =
  15. 52 × 25 =
  16. 102 × 5 =

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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.