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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 437 · 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. 1.43 × 4 =
  2. 2.11² =
  3. 3.70 − 46 =
  4. 4.82 − 21 =
  5. 5.67 + 8 =
  6. 6.13 × 8 =
  7. 7.30 + 39 =
  8. 8.464 ÷ 8 =
  9. 9.7 + 4 =
  10. 10.84 − 19 =
  11. 11.Best estimate of 27 × 27? (a) 900 (b) 9000 (c) 90
  12. 12.74 − 47 =
  13. 13.68 − 18 =
  14. 14.71 − 21 =
  15. 15.24 + ? = 100
  16. 16.69 − 31 =
  17. 17.21 × 7 =
  18. 18.5% of ₹120 =
  19. 19.Double 88 =
  20. 20.21² =
  21. 21.26² =
  22. 22.25 + 8 =
  23. 23.107 − 93 =
  24. 24.55 children stand in rows of 9. How many full rows can they make?
  25. 25.592 ÷ 8 =
  26. 26.56 + 7 =
  27. 27.10% of ₹250 =
  28. 28.32 + 42 =
  29. 29.What is the remainder when 86 is divided by 8?
  30. 30.14 + 16 =
  31. 31.15 + 7 =
  32. 32.99 × 6 =
  33. 33.50% of ₹900 =
  34. 34.23 + 25 =
  35. 35.208 ÷ 8 =
  36. 36.86 + ? = 100
  37. 37.24 + 43 =
  38. 38.Double 36 =
  39. 39.81 + 28 =
  40. 40.29 × 4 =

Answer key

  1. 172
  2. 121
  3. 24
  4. 61
  5. 75
  6. 104
  7. 69
  8. 58
  9. 11
  10. 65
  11. 900
  12. 27
  13. 50
  14. 50
  15. 76
  16. 38
  17. 147
  18. 6
  19. 176
  20. 441
  21. 676
  22. 33
  23. 14
  24. 6
  25. 74
  26. 63
  27. 25
  28. 74
  29. 6
  30. 30
  31. 22
  32. 594
  33. 450
  34. 48
  35. 26
  36. 14
  37. 67
  38. 72
  39. 109
  40. 116

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