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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 334 · 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 83 × 28? (a) 2400 (b) 240 (c) 24000
  2. 2.61 × 4 =
  3. 3.468 ÷ 6 =
  4. 4.695 + 99 =
  5. 5.75 + 8 =
  6. 6.296 ÷ 8 =
  7. 7.26 + 29 =
  8. 8.29 × 8 =
  9. 9.Double 91 =
  10. 10.29 + 9 =
  11. 11.16² =
  12. 12.33 + ? = 100
  13. 13.22² =
  14. 14.62 + 84 =
  15. 15.221 − 187 =
  16. 16.56 − 37 =
  17. 17.147 ÷ 7 =
  18. 18.Half of 26 =
  19. 19.Best estimate of 60 × 69? (a) 42000 (b) 4200 (c) 420
  20. 20.23 + 29 =
  21. 21.25² =
  22. 22.91 laddoos are packed in boxes of 9. How many laddoos are left over?
  23. 23.15 + 9 =
  24. 24.18 × 7 =
  25. 25.85 − 69 =
  26. 26.64 × 4 =
  27. 27.89 + 87 =
  28. 28.26 × 4 =
  29. 29.59 laddoos are packed in boxes of 7. How many laddoos are left over?
  30. 30.41 + 9 =
  31. 31.72 + 41 =
  32. 32.You start your homework at 4:30 and finish at 5:55. How many minutes did you work?
  33. 33.42 + ? = 100
  34. 34.95 × 8 =
  35. 35.What is the remainder when 57 is divided by 5?
  36. 36.50% of ₹450 =
  37. 37.You buy a storybook for ₹188 and pay with a ₹500 note. How much change do you get, in rupees?
  38. 38.57 + 29 =
  39. 39.54 + 51 =
  40. 40.9 + ? = 10

Answer key

  1. 2400
  2. 244
  3. 78
  4. 794
  5. 83
  6. 37
  7. 55
  8. 232
  9. 182
  10. 38
  11. 256
  12. 67
  13. 484
  14. 146
  15. 34
  16. 19
  17. 21
  18. 13
  19. 4200
  20. 52
  21. 625
  22. 1
  23. 24
  24. 126
  25. 16
  26. 256
  27. 176
  28. 104
  29. 3
  30. 50
  31. 113
  32. 85
  33. 58
  34. 760
  35. 2
  36. 225
  37. 312
  38. 86
  39. 105
  40. 1

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