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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 85 · 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. 1.26² =
  2. 2.39 + ? = 100
  3. 3.207 + 99 =
  4. 4.232 ÷ 8 =
  5. 5.82 − 51 =
  6. 6.81 × 4 =
  7. 7.318 − 280 =
  8. 8.Double 38 =
  9. 9.31 + 58 =
  10. 10.61 × 4 =
  11. 11.Best estimate of 32 × 70? (a) 210 (b) 2100 (c) 21000
  12. 12.34 × 4 =
  13. 13.11 + 12 =
  14. 14.69 − 14 =
  15. 15.175 + 99 =
  16. 16.39 + 7 =
  17. 17.21 + 19 =
  18. 18.40 × 8 =
  19. 19.70 + ? = 100
  20. 20.Half of 72 =
  21. 21.33 + ? = 100
  22. 22.12 + 11 =
  23. 23.18 × 5 =
  24. 24.117 − 94 =
  25. 25.14² =
  26. 26.98 − 58 =
  27. 27.5% of ₹300 =
  28. 28.17 + 29 =
  29. 29.What is the remainder when 37 is divided by 4?
  30. 30.55 − 42 =
  31. 31.88 + 21 =
  32. 32.64 − 14 =
  33. 33.16² =
  34. 34.223 − 186 =
  35. 35.91 − 65 =
  36. 36.224 ÷ 8 =
  37. 37.101 − 96 =
  38. 38.291 ÷ 3 =
  39. 39.68 ÷ 4 =
  40. 40.91 × 8 =

Answer key

  1. 676
  2. 61
  3. 306
  4. 29
  5. 31
  6. 324
  7. 38
  8. 76
  9. 89
  10. 244
  11. 2100
  12. 136
  13. 23
  14. 55
  15. 274
  16. 46
  17. 40
  18. 320
  19. 30
  20. 36
  21. 67
  22. 23
  23. 90
  24. 23
  25. 196
  26. 40
  27. 15
  28. 46
  29. 1
  30. 13
  31. 109
  32. 50
  33. 256
  34. 37
  35. 26
  36. 28
  37. 5
  38. 97
  39. 17
  40. 728

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