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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 690 · 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. 1.15² =
  2. 2.You start your homework at 6:45 and finish at 9:30. How many minutes did you work?
  3. 3.Best estimate of 56 × 86? (a) 54000 (b) 5400 (c) 540
  4. 4.69 + 9 =
  5. 5.14 + 15 =
  6. 6.351 ÷ 9 =
  7. 7.22 + 23 =
  8. 8.5 + ? = 10
  9. 9.21² =
  10. 10.380 ÷ 5 =
  11. 11.14² =
  12. 12.80 + 9 =
  13. 13.A film starts at 7:35 and ends at 8:10. How many minutes long is the film?
  14. 14.24 + ? = 100
  15. 15.10% of ₹620 =
  16. 16.4 + ? = 10
  17. 17.29² =
  18. 18.38 + ? = 100
  19. 19.Best estimate of 838 + 463? (a) 1300 (b) 1500 (c) 1100
  20. 20.49 + 9 =
  21. 21.Best estimate of 44 × 70? (a) 28000 (b) 2800 (c) 280
  22. 22.53 × 4 =
  23. 23.50% of ₹240 =
  24. 24.622 − 99 =
  25. 25.Half of 54 =
  26. 26.10% of ₹740 =
  27. 27.8 + 4 =
  28. 28.Double 28 =
  29. 29.19 + 20 =
  30. 30.59 + 8 =
  31. 31.46 + ? = 100
  32. 32.110 − 59 =
  33. 33.27 + 73 =
  34. 34.47 × 3 =
  35. 35.354 ÷ 6 =
  36. 36.65 laddoos are packed in boxes of 8. How many laddoos are left over?
  37. 37.121 − 86 =
  38. 38.16 + 6 =
  39. 39.152 ÷ 4 =
  40. 40.28 + 19 =

Answer key

  1. 225
  2. 165
  3. 5400
  4. 78
  5. 29
  6. 39
  7. 45
  8. 5
  9. 441
  10. 76
  11. 196
  12. 89
  13. 35
  14. 76
  15. 62
  16. 6
  17. 841
  18. 62
  19. 1300
  20. 58
  21. 2800
  22. 212
  23. 120
  24. 523
  25. 27
  26. 74
  27. 12
  28. 56
  29. 39
  30. 67
  31. 54
  32. 51
  33. 100
  34. 141
  35. 59
  36. 1
  37. 35
  38. 22
  39. 38
  40. 47

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