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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 781 · 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. 1.62 laddoos are packed in boxes of 7. How many laddoos are left over?
  2. 2.23 + 19 =
  3. 3.112 − 89 =
  4. 4.Double 31 =
  5. 5.303 − 287 =
  6. 6.324 − 298 =
  7. 7.5% of ₹40 =
  8. 8.43 + 77 =
  9. 9.25% of ₹600 =
  10. 10.28² =
  11. 11.70 − 41 =
  12. 12.57 − 35 =
  13. 13.You start your homework at 1:45 and finish at 3:25. How many minutes did you work?
  14. 14.84 − 56 =
  15. 15.81 + 58 =
  16. 16.297 ÷ 9 =
  17. 17.28 × 9 =
  18. 18.10% of ₹660 =
  19. 19.17² =
  20. 20.16 + 15 =
  21. 21.You buy a water bottle for ₹188 and pay with a ₹500 note. How much change do you get, in rupees?
  22. 22.5% of ₹560 =
  23. 23.You buy a cricket ball for ₹85 and pay with a ₹100 note. How much change do you get, in rupees?
  24. 24.82 − 69 =
  25. 25.10 + 11 =
  26. 26.78 ÷ 3 =
  27. 27.Best estimate of 53 × 14? (a) 5000 (b) 500 (c) 50
  28. 28.12² =
  29. 29.23 + ? = 100
  30. 30.Best estimate of 96 × 76? (a) 80000 (b) 800 (c) 8000
  31. 31.110 − 75 =
  32. 32.38 − 19 =
  33. 33.73 × 4 =
  34. 34.57 × 3 =
  35. 35.21 × 7 =
  36. 36.16 + 29 =
  37. 37.72 × 4 =
  38. 38.54 − 33 =
  39. 39.125 ÷ 5 =
  40. 40.Double 26 =

Answer key

  1. 6
  2. 42
  3. 23
  4. 62
  5. 16
  6. 26
  7. 2
  8. 120
  9. 150
  10. 784
  11. 29
  12. 22
  13. 100
  14. 28
  15. 139
  16. 33
  17. 252
  18. 66
  19. 289
  20. 31
  21. 312
  22. 28
  23. 15
  24. 13
  25. 21
  26. 26
  27. 500
  28. 144
  29. 77
  30. 8000
  31. 35
  32. 19
  33. 292
  34. 171
  35. 147
  36. 45
  37. 288
  38. 21
  39. 25
  40. 52

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