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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 409 · 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. 1.81 − 70 =
  2. 2.65 + 32 =
  3. 3.27 × 6 =
  4. 4.19 + 21 =
  5. 5.Best estimate of 83 × 57? (a) 48000 (b) 4800 (c) 480
  6. 6.50% of ₹700 =
  7. 7.50% of ₹130 =
  8. 8.243 ÷ 9 =
  9. 9.1 + ? = 10
  10. 10.2 + ? = 10
  11. 11.72 + 88 =
  12. 12.16² =
  13. 13.232 ÷ 8 =
  14. 14.69 + 2 =
  15. 15.282 ÷ 3 =
  16. 16.11² =
  17. 17.200 ÷ 8 =
  18. 18.144 ÷ 8 =
  19. 19.You buy a notebook for ₹18 and a pen for ₹23. You pay with a ₹100 note. How much change do you get, in rupees?
  20. 20.21² =
  21. 21.4 + ? = 10
  22. 22.You buy a pencil box for ₹227 and pay with a ₹500 note. How much change do you get, in rupees?
  23. 23.13 + 15 =
  24. 24.76 − 15 =
  25. 25.38 + 16 =
  26. 26.5% of ₹160 =
  27. 27.78 + 5 =
  28. 28.50% of ₹820 =
  29. 29.12 + 11 =
  30. 30.You start your homework at 6:00 and finish at 8:50. How many minutes did you work?
  31. 31.51 × 7 =
  32. 32.87 + 7 =
  33. 33.616 ÷ 8 =
  34. 34.8 + ? = 10
  35. 35.47 + ? = 100
  36. 36.Half of 36 =
  37. 37.46 × 4 =
  38. 38.29 + 41 =
  39. 39.31 × 8 =
  40. 40.7 + ? = 10

Answer key

  1. 11
  2. 97
  3. 162
  4. 40
  5. 4800
  6. 350
  7. 65
  8. 27
  9. 9
  10. 8
  11. 160
  12. 256
  13. 29
  14. 71
  15. 94
  16. 121
  17. 25
  18. 18
  19. 59
  20. 441
  21. 6
  22. 273
  23. 28
  24. 61
  25. 54
  26. 8
  27. 83
  28. 410
  29. 23
  30. 170
  31. 357
  32. 94
  33. 77
  34. 2
  35. 53
  36. 18
  37. 184
  38. 70
  39. 248
  40. 3

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