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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 625 · 40 questions
TalentJR

How to do it in your head (Look first): A 9, 19 or 99 → round and adjust. Two close numbers → count up (or near doubles when adding). × or ÷ by 4 or 8 → double or halve; other sums → split into tens and ones.

NameDateTime takenScore ___ / 40
  1. 1.236 ÷ 4 =
  2. 2.13² =
  3. 3.68 + 82 =
  4. 4.5% of ₹410 =
  5. 5.21 × 4 =
  6. 6.11² =
  7. 7.96 − 72 =
  8. 8.18² =
  9. 9.28² =
  10. 10.30 × 4 =
  11. 11.50% of ₹770 =
  12. 12.Best estimate of 743 + 265? (a) 800 (b) 1200 (c) 1000
  13. 13.Best estimate of 398 + 136? (a) 300 (b) 500 (c) 700
  14. 14.26 laddoos are packed in boxes of 4. How many laddoos are left over?
  15. 15.70 − 17 =
  16. 16.75 + 7 =
  17. 17.12² =
  18. 18.5 + ? = 10
  19. 19.47 children stand in rows of 9. How many full rows can they make?
  20. 20.28 + 27 =
  21. 21.48 × 3 =
  22. 22.55 + 7 =
  23. 23.Best estimate of 17 × 26? (a) 6000 (b) 600 (c) 60
  24. 24.170 ÷ 5 =
  25. 25.A film starts at 1:55 and ends at 3:30. How many minutes long is the film?
  26. 26.75 − 13 =
  27. 27.31 + ? = 100
  28. 28.53 − 46 =
  29. 29.10% of ₹520 =
  30. 30.85 + ? = 100
  31. 31.103 − 84 =
  32. 32.67 + 9 =
  33. 33.12 × 6 =
  34. 34.Best estimate of 388 + 214? (a) 400 (b) 600 (c) 800
  35. 35.133 ÷ 7 =
  36. 36.40 × 4 =
  37. 37.123 − 85 =
  38. 38.Best estimate of 46 × 26? (a) 15000 (b) 1500 (c) 150
  39. 39.204 ÷ 4 =
  40. 40.43 + 55 =

Answer key

  1. 59
  2. 169
  3. 150
  4. 20.5
  5. 84
  6. 121
  7. 24
  8. 324
  9. 784
  10. 120
  11. 385
  12. 1000
  13. 500
  14. 2
  15. 53
  16. 82
  17. 144
  18. 5
  19. 5
  20. 55
  21. 144
  22. 62
  23. 600
  24. 34
  25. 95
  26. 62
  27. 69
  28. 7
  29. 52
  30. 15
  31. 19
  32. 76
  33. 72
  34. 600
  35. 19
  36. 160
  37. 38
  38. 1500
  39. 51
  40. 98

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