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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 301 · 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.Half of 56 =
  2. 2.51 + ? = 100
  3. 3.72 − 9 =
  4. 4.276 ÷ 6 =
  5. 5.Best estimate of 36 × 84? (a) 32000 (b) 320 (c) 3200
  6. 6.43 + 71 =
  7. 7.24 + 23 =
  8. 8.29 + 28 =
  9. 9.73 + 29 =
  10. 10.Double 85 =
  11. 11.21 + ? = 100
  12. 12.378 ÷ 9 =
  13. 13.228 ÷ 4 =
  14. 14.Double 51 =
  15. 15.24 children stand in rows of 5. How many full rows can they make?
  16. 16.16² =
  17. 17.66 + ? = 100
  18. 18.23 + 25 =
  19. 19.45 + ? = 100
  20. 20.61 − 33 =
  21. 21.49 + ? = 100
  22. 22.12 × 8 =
  23. 23.256 ÷ 4 =
  24. 24.94 × 4 =
  25. 25.25 × 6 =
  26. 26.25% of ₹150 =
  27. 27.17 + 8 =
  28. 28.88 ÷ 8 =
  29. 29.128 ÷ 4 =
  30. 30.13 children stand in rows of 3. How many full rows can they make?
  31. 31.79 × 3 =
  32. 32.12 + 14 =
  33. 33.14 + 15 =
  34. 34.79 − 31 =
  35. 35.80 − 9 =
  36. 36.25% of ₹140 =
  37. 37.86 × 5 =
  38. 38.20 + 19 =
  39. 39.10% of ₹530 =
  40. 40.7 + 8 =

Answer key

  1. 28
  2. 49
  3. 63
  4. 46
  5. 3200
  6. 114
  7. 47
  8. 57
  9. 102
  10. 170
  11. 79
  12. 42
  13. 57
  14. 102
  15. 4
  16. 256
  17. 34
  18. 48
  19. 55
  20. 28
  21. 51
  22. 96
  23. 64
  24. 376
  25. 150
  26. 37.5
  27. 25
  28. 11
  29. 32
  30. 4
  31. 237
  32. 26
  33. 29
  34. 48
  35. 71
  36. 35
  37. 430
  38. 39
  39. 53
  40. 15

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