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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 928 · 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. 1.56 + 21 =
  2. 2.98 − 57 =
  3. 3.67 − 19 =
  4. 4.Half of 168 =
  5. 5.13 + 19 =
  6. 6.76 + 61 =
  7. 7.46 + 6 =
  8. 8.72 + 9 =
  9. 9.A train leaves at 4:40 and reaches the next city at 5:15. How many minutes is the journey?
  10. 10.16² =
  11. 11.68 + 4 =
  12. 12.10% of ₹580 =
  13. 13.87 × 5 =
  14. 14.Best estimate of 77 × 68? (a) 56000 (b) 5600 (c) 560
  15. 15.82 + ? = 100
  16. 16.You buy a water bottle for ₹19 and a pen for ₹32. You pay with a ₹100 note. How much change do you get, in rupees?
  17. 17.62 − 37 =
  18. 18.Half of 62 =
  19. 19.82 − 46 =
  20. 20.77 − 37 =
  21. 21.388 ÷ 4 =
  22. 22.39 × 8 =
  23. 23.2 + ? = 10
  24. 24.69 + 18 =
  25. 25.600 ÷ 8 =
  26. 26.92 − 16 =
  27. 27.5 + ? = 10
  28. 28.747 ÷ 9 =
  29. 29.26 + 27 =
  30. 30.263 + 99 =
  31. 31.Best estimate of 157 + 283? (a) 500 (b) 300 (c) 700
  32. 32.28 + 29 =
  33. 33.Double 52 =
  34. 34.8 + ? = 10
  35. 35.A train leaves at 7:50 and reaches the next city at 8:35. How many minutes is the journey?
  36. 36.30 × 8 =
  37. 37.78 + 3 =
  38. 38.Best estimate of 73 × 26? (a) 21000 (b) 2100 (c) 210
  39. 39.36 × 8 =
  40. 40.85 − 71 =

Answer key

  1. 77
  2. 41
  3. 48
  4. 84
  5. 32
  6. 137
  7. 52
  8. 81
  9. 35
  10. 256
  11. 72
  12. 58
  13. 435
  14. 5600
  15. 18
  16. 49
  17. 25
  18. 31
  19. 36
  20. 40
  21. 97
  22. 312
  23. 8
  24. 87
  25. 75
  26. 76
  27. 5
  28. 83
  29. 53
  30. 362
  31. 500
  32. 57
  33. 104
  34. 2
  35. 45
  36. 240
  37. 81
  38. 2100
  39. 288
  40. 14

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