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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 777 · 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. 1.12 × 8 =
  2. 2.84 × 5 =
  3. 3.Best estimate of 658 + 582? (a) 1500 (b) 1300 (c) 1100
  4. 4.14 × 3 =
  5. 5.20 × 4 =
  6. 6.A cricket match starts at 5:15 and the first innings ends at 7:05. How many minutes did the innings last?
  7. 7.Half of 142 =
  8. 8.24² =
  9. 9.57 + 9 =
  10. 10.39 × 8 =
  11. 11.38 + 9 =
  12. 12.51 × 4 =
  13. 13.24 × 8 =
  14. 14.Half of 56 =
  15. 15.Best estimate of 81 × 26? (a) 24000 (b) 2400 (c) 240
  16. 16.18 + 9 =
  17. 17.A film starts at 5:35 and ends at 7:45. How many minutes long is the film?
  18. 18.64 × 9 =
  19. 19.27 × 4 =
  20. 20.58 − 35 =
  21. 21.24 + 19 =
  22. 22.24 + 66 =
  23. 23.2 + ? = 10
  24. 24.10 + 9 =
  25. 25.168 ÷ 8 =
  26. 26.31 × 8 =
  27. 27.You buy a box of crayons for ₹386 and pay with a ₹500 note. How much change do you get, in rupees?
  28. 28.61 + ? = 100
  29. 29.43 + 13 =
  30. 30.203 − 191 =
  31. 31.81 + ? = 100
  32. 32.50% of ₹710 =
  33. 33.12 × 6 =
  34. 34.Best estimate of 26 × 70? (a) 21000 (b) 210 (c) 2100
  35. 35.83 − 62 =
  36. 36.56 − 43 =
  37. 37.23 + 41 =
  38. 38.176 ÷ 4 =
  39. 39.10% of ₹80 =
  40. 40.19 + 2 =

Answer key

  1. 96
  2. 420
  3. 1300
  4. 42
  5. 80
  6. 110
  7. 71
  8. 576
  9. 66
  10. 312
  11. 47
  12. 204
  13. 192
  14. 28
  15. 2400
  16. 27
  17. 130
  18. 576
  19. 108
  20. 23
  21. 43
  22. 90
  23. 8
  24. 19
  25. 21
  26. 248
  27. 114
  28. 39
  29. 56
  30. 12
  31. 19
  32. 355
  33. 72
  34. 2100
  35. 21
  36. 13
  37. 64
  38. 44
  39. 8
  40. 21

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