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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 646 · 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. 1.7 + 8 =
  2. 2.27 + 36 =
  3. 3.180 ÷ 5 =
  4. 4.75 − 35 =
  5. 5.1021 − 980 =
  6. 6.31 × 8 =
  7. 7.60 + 24 =
  8. 8.75 × 4 =
  9. 9.22 × 4 =
  10. 10.7 + 4 =
  11. 11.50 + ? = 100
  12. 12.18 + 6 =
  13. 13.56 + 6 =
  14. 14.61 − 37 =
  15. 15.66 − 36 =
  16. 16.15 + 6 =
  17. 17.488 ÷ 8 =
  18. 18.13 × 4 =
  19. 19.89 + ? = 100
  20. 20.74 − 29 =
  21. 21.Half of 68 =
  22. 22.31 + 17 =
  23. 23.22² =
  24. 24.17 + 9 =
  25. 25.25% of ₹480 =
  26. 26.63 − 26 =
  27. 27.16² =
  28. 28.12² =
  29. 29.26² =
  30. 30.17 + 8 =
  31. 31.21 + ? = 100
  32. 32.What is the remainder when 62 is divided by 7?
  33. 33.88 × 3 =
  34. 34.47 + ? = 100
  35. 35.Best estimate of 577 + 822? (a) 1200 (b) 1400 (c) 1600
  36. 36.Half of 76 =
  37. 37.60 − 9 =
  38. 38.33 × 4 =
  39. 39.108 ÷ 4 =
  40. 40.10% of ₹150 =

Answer key

  1. 15
  2. 63
  3. 36
  4. 40
  5. 41
  6. 248
  7. 84
  8. 300
  9. 88
  10. 11
  11. 50
  12. 24
  13. 62
  14. 24
  15. 30
  16. 21
  17. 61
  18. 52
  19. 11
  20. 45
  21. 34
  22. 48
  23. 484
  24. 26
  25. 120
  26. 37
  27. 256
  28. 144
  29. 676
  30. 25
  31. 79
  32. 6
  33. 264
  34. 53
  35. 1400
  36. 38
  37. 51
  38. 132
  39. 27
  40. 15

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