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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 3 · 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.Best estimate of 439 + 723? (a) 1300 (b) 900 (c) 1100
  2. 2.11 + 12 =
  3. 3.56 × 3 =
  4. 4.17 × 8 =
  5. 5.25% of ₹50 =
  6. 6.1024 − 998 =
  7. 7.148 ÷ 4 =
  8. 8.460 ÷ 5 =
  9. 9.14² =
  10. 10.201 − 181 =
  11. 11.Best estimate of 419 + 826? (a) 1000 (b) 1400 (c) 1200
  12. 12.16² =
  13. 13.17 × 6 =
  14. 14.406 ÷ 7 =
  15. 15.30 × 8 =
  16. 16.15 + 17 =
  17. 17.65 − 12 =
  18. 18.50% of ₹580 =
  19. 19.24 + 17 =
  20. 20.85 + 76 =
  21. 21.10% of ₹200 =
  22. 22.10% of ₹770 =
  23. 23.A film starts at 2:05 and ends at 4:40. How many minutes long is the film?
  24. 24.25² =
  25. 25.9 + ? = 10
  26. 26.33 + ? = 100
  27. 27.94 laddoos are packed in boxes of 9. How many laddoos are left over?
  28. 28.81 − 66 =
  29. 29.104 ÷ 4 =
  30. 30.92 − 31 =
  31. 31.29² =
  32. 32.51 + ? = 100
  33. 33.19 + 29 =
  34. 34.10% of ₹250 =
  35. 35.A train leaves at 7:05 and reaches the next city at 8:55. How many minutes is the journey?
  36. 36.80 − 9 =
  37. 37.21² =
  38. 38.15 + 16 =
  39. 39.67 + ? = 100
  40. 40.502 − 99 =

Answer key

  1. 1100
  2. 23
  3. 168
  4. 136
  5. 12.5
  6. 26
  7. 37
  8. 92
  9. 196
  10. 20
  11. 1200
  12. 256
  13. 102
  14. 58
  15. 240
  16. 32
  17. 53
  18. 290
  19. 41
  20. 161
  21. 20
  22. 77
  23. 155
  24. 625
  25. 1
  26. 67
  27. 4
  28. 15
  29. 26
  30. 61
  31. 841
  32. 49
  33. 48
  34. 25
  35. 110
  36. 71
  37. 441
  38. 31
  39. 33
  40. 403

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