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Free · Class 1–5 · 3 worksheets · answer keys · practise online · set 18

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 18
Name:Date:Score:    / 20

Solve in your head.

  1. 50 + 3 =
  2. Double 4 =
  3. 19 − 9 =
  4. 10 − 7 =
  5. 80 + 5 =
  6. 8 + 3 =
  7. 12 − 12 =
  8. 2 + 3 =
  9. Double 9 =
  10. 40 + 1 =
  11. 17 − 6 =
  12. 9 + 9 =
  13. 10 − 9 =
  14. 10 + 10 =
  15. Double 8 =
  16. Double 3 =
  17. 4 + 2 =
  18. 10 − 1 =
  19. 7 + 5 =
  20. 19 − 14 =

Mental maths — Class 3

Class 3 · Worksheet 2 · set 18
Name:Date:Score:    / 20

Solve in your head.

  1. Double 28 =
  2. 100 − 60 =
  3. 47 × 10 =
  4. 42 + 9 =
  5. 66 + 9 =
  6. 50 + 9 =
  7. Half of 26 =
  8. Half of 82 =
  9. Half of 100 =
  10. 26 + 9 =
  11. Half of 16 =
  12. Double 20 =
  13. 54 × 10 =
  14. Double 44 =
  15. 45 × 10 =
  16. 35 × 10 =
  17. Half of 78 =
  18. 19 + 9 =
  19. 100 − 80 =
  20. Double 50 =

Mental maths — Class 4–5

Class 4–5 · Worksheet 3 · set 18
Name:Date:Score:    / 16

Solve in your head. Use the tricks.

  1. 416 + 399 =
  2. 335 + 99 =
  3. 46 × 11 =
  4. 39 × 11 =
  5. 87 × 11 =
  6. 73 × 11 =
  7. 28 × 25 =
  8. 56 × 11 =
  9. 100 × 25 =
  10. 34 × 99 =
  11. 26 × 11 =
  12. 126 × 5 =
  13. 84 × 11 =
  14. 350 + 299 =
  15. 24 × 99 =
  16. 360 + 399 =

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.