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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 86 · 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. 1.30 + 23 =
  2. 2.Best estimate of 58 × 22? (a) 1200 (b) 12000 (c) 120
  3. 3.Double 42 =
  4. 4.73 × 7 =
  5. 5.91 − 59 =
  6. 6.124 ÷ 4 =
  7. 7.16 + 6 =
  8. 8.9 + 8 =
  9. 9.9 + ? = 10
  10. 10.21 + 23 =
  11. 11.53 − 35 =
  12. 12.502 − 486 =
  13. 13.23 + 27 =
  14. 14.Half of 186 =
  15. 15.55 + 19 =
  16. 16.1 + ? = 10
  17. 17.78 − 47 =
  18. 18.25% of ₹640 =
  19. 19.A train leaves at 6:25 and reaches the next city at 8:55. How many minutes is the journey?
  20. 20.65 + 8 =
  21. 21.40 × 8 =
  22. 22.362 − 99 =
  23. 23.21² =
  24. 24.76 + 5 =
  25. 25.78 − 51 =
  26. 26.68 × 8 =
  27. 27.42 − 29 =
  28. 28.Double 31 =
  29. 29.79 + 5 =
  30. 30.37 + 41 =
  31. 31.A train leaves at 5:55 and reaches the next city at 7:30. How many minutes is the journey?
  32. 32.You buy a notebook for ₹12 and pay with a ₹100 note. How much change do you get, in rupees?
  33. 33.9 + 11 =
  34. 34.63 + 57 =
  35. 35.25% of ₹240 =
  36. 36.74 + ? = 100
  37. 37.10% of ₹640 =
  38. 38.82 × 8 =
  39. 39.64 × 3 =
  40. 40.97 − 73 =

Answer key

  1. 53
  2. 1200
  3. 84
  4. 511
  5. 32
  6. 31
  7. 22
  8. 17
  9. 1
  10. 44
  11. 18
  12. 16
  13. 50
  14. 93
  15. 74
  16. 9
  17. 31
  18. 160
  19. 150
  20. 73
  21. 320
  22. 263
  23. 441
  24. 81
  25. 27
  26. 544
  27. 13
  28. 62
  29. 84
  30. 78
  31. 95
  32. 88
  33. 20
  34. 120
  35. 60
  36. 26
  37. 64
  38. 656
  39. 192
  40. 24

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