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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 878 · 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 43 × 63? (a) 2400 (b) 24000 (c) 240
  2. 2.5 + ? = 10
  3. 3.68 − 33 =
  4. 4.10% of ₹470 =
  5. 5.14 × 8 =
  6. 6.You buy a pencil box for ₹32 and a pen for ₹41. You pay with a ₹100 note. How much change do you get, in rupees?
  7. 7.64 − 29 =
  8. 8.Double 64 =
  9. 9.35 + ? = 100
  10. 10.6 + ? = 10
  11. 11.184 ÷ 8 =
  12. 12.24 × 4 =
  13. 13.25² =
  14. 14.Half of 74 =
  15. 15.301 − 295 =
  16. 16.75 × 4 =
  17. 17.81 − 43 =
  18. 18.19² =
  19. 19.Best estimate of 33 × 22? (a) 60 (b) 6000 (c) 600
  20. 20.60 − 29 =
  21. 21.Best estimate of 409 + 431? (a) 1000 (b) 600 (c) 800
  22. 22.Double 32 =
  23. 23.5 + 7 =
  24. 24.50% of ₹770 =
  25. 25.100 − 74 =
  26. 26.55 + 9 =
  27. 27.26² =
  28. 28.28² =
  29. 29.264 ÷ 8 =
  30. 30.82 + ? = 100
  31. 31.136 ÷ 8 =
  32. 32.41 + 84 =
  33. 33.Double 74 =
  34. 34.You buy a kite for ₹47 and pay with a ₹100 note. How much change do you get, in rupees?
  35. 35.77 + 19 =
  36. 36.11 + 13 =
  37. 37.73 − 28 =
  38. 38.A film starts at 2:10 and ends at 5:30. How many minutes long is the film?
  39. 39.281 + 99 =
  40. 40.88 ÷ 4 =

Answer key

  1. 2400
  2. 5
  3. 35
  4. 47
  5. 112
  6. 27
  7. 35
  8. 128
  9. 65
  10. 4
  11. 23
  12. 96
  13. 625
  14. 37
  15. 6
  16. 300
  17. 38
  18. 361
  19. 600
  20. 31
  21. 800
  22. 64
  23. 12
  24. 385
  25. 26
  26. 64
  27. 676
  28. 784
  29. 33
  30. 18
  31. 17
  32. 125
  33. 148
  34. 53
  35. 96
  36. 24
  37. 45
  38. 200
  39. 380
  40. 22

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