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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 689 · 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.A film starts at 1:05 and ends at 2:10. How many minutes long is the film?
  2. 2.5% of ₹600 =
  3. 3.2 + ? = 10
  4. 4.Best estimate of 43 × 76? (a) 320 (b) 3200 (c) 32000
  5. 5.A train leaves at 7:15 and reaches the next city at 9:00. How many minutes is the journey?
  6. 6.622 + 99 =
  7. 7.49 + 6 =
  8. 8.12² =
  9. 9.25% of ₹60 =
  10. 10.Half of 58 =
  11. 11.51 + 29 =
  12. 12.Best estimate of 98 × 96? (a) 100000 (b) 1000 (c) 10000
  13. 13.18 × 8 =
  14. 14.Best estimate of 98 × 61? (a) 60000 (b) 6000 (c) 600
  15. 15.510 ÷ 6 =
  16. 16.Double 82 =
  17. 17.A film starts at 6:25 and ends at 7:40. How many minutes long is the film?
  18. 18.Half of 148 =
  19. 19.59 × 4 =
  20. 20.Double 36 =
  21. 21.26² =
  22. 22.129 − 82 =
  23. 23.39 − 29 =
  24. 24.You buy a pencil box for ₹359 and pay with a ₹500 note. How much change do you get, in rupees?
  25. 25.204 ÷ 3 =
  26. 26.9 + 6 =
  27. 27.132 ÷ 4 =
  28. 28.60 − 47 =
  29. 29.69 − 26 =
  30. 30.82 − 29 =
  31. 31.3 + ? = 10
  32. 32.232 ÷ 8 =
  33. 33.100 − 55 =
  34. 34.60 − 35 =
  35. 35.86 − 29 =
  36. 36.31 + 36 =
  37. 37.21² =
  38. 38.16 + 8 =
  39. 39.46 + 48 =
  40. 40.72 + ? = 100

Answer key

  1. 65
  2. 30
  3. 8
  4. 3200
  5. 105
  6. 721
  7. 55
  8. 144
  9. 15
  10. 29
  11. 80
  12. 10000
  13. 144
  14. 6000
  15. 85
  16. 164
  17. 75
  18. 74
  19. 236
  20. 72
  21. 676
  22. 47
  23. 10
  24. 141
  25. 68
  26. 15
  27. 33
  28. 13
  29. 43
  30. 53
  31. 7
  32. 29
  33. 45
  34. 25
  35. 57
  36. 67
  37. 441
  38. 24
  39. 94
  40. 28

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