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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 859 · 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. 1.63 − 46 =
  2. 2.Best estimate of 96 × 57? (a) 60000 (b) 6000 (c) 600
  3. 3.16 + 17 =
  4. 4.34 × 4 =
  5. 5.98 − 18 =
  6. 6.100 laddoos are packed in boxes of 8. How many laddoos are left over?
  7. 7.495 ÷ 5 =
  8. 8.2 + ? = 10
  9. 9.55 + 6 =
  10. 10.8 + ? = 10
  11. 11.Double 27 =
  12. 12.425 ÷ 5 =
  13. 13.58 − 37 =
  14. 14.72 + 61 =
  15. 15.You start your homework at 7:00 and finish at 8:05. How many minutes did you work?
  16. 16.19 + 2 =
  17. 17.79 + ? = 100
  18. 18.Half of 50 =
  19. 19.6 + ? = 10
  20. 20.12 + 11 =
  21. 21.35 × 8 =
  22. 22.A film starts at 8:05 and ends at 10:50. How many minutes long is the film?
  23. 23.100 ÷ 4 =
  24. 24.39 × 4 =
  25. 25.204 ÷ 6 =
  26. 26.You buy a notebook for ₹42 and pay with a ₹100 note. How much change do you get, in rupees?
  27. 27.68 × 4 =
  28. 28.34 + 19 =
  29. 29.9 + ? = 10
  30. 30.112 − 95 =
  31. 31.67 × 4 =
  32. 32.86 × 8 =
  33. 33.17 × 8 =
  34. 34.72 − 21 =
  35. 35.21 + 22 =
  36. 36.A train leaves at 7:50 and reaches the next city at 10:15. How many minutes is the journey?
  37. 37.43 × 4 =
  38. 38.33 + ? = 100
  39. 39.65 + 9 =
  40. 40.1 + ? = 10

Answer key

  1. 17
  2. 6000
  3. 33
  4. 136
  5. 80
  6. 4
  7. 99
  8. 8
  9. 61
  10. 2
  11. 54
  12. 85
  13. 21
  14. 133
  15. 65
  16. 21
  17. 21
  18. 25
  19. 4
  20. 23
  21. 280
  22. 165
  23. 25
  24. 156
  25. 34
  26. 58
  27. 272
  28. 53
  29. 1
  30. 17
  31. 268
  32. 688
  33. 136
  34. 51
  35. 43
  36. 145
  37. 172
  38. 67
  39. 74
  40. 9

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