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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 151 · 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. 1.65 − 23 =
  2. 2.13² =
  3. 3.You buy a storybook for ₹302 and pay with a ₹500 note. How much change do you get, in rupees?
  4. 4.15 + 14 =
  5. 5.24 + 74 =
  6. 6.10% of ₹440 =
  7. 7.32 × 6 =
  8. 8.518 − 492 =
  9. 9.15² =
  10. 10.25% of ₹600 =
  11. 11.53 + 9 =
  12. 12.5% of ₹850 =
  13. 13.29 × 3 =
  14. 14.11² =
  15. 15.9 + 3 =
  16. 16.156 ÷ 6 =
  17. 17.212 ÷ 4 =
  18. 18.53 − 33 =
  19. 19.83 × 8 =
  20. 20.25 − 19 =
  21. 21.11 + 13 =
  22. 22.12 + 11 =
  23. 23.22 + 24 =
  24. 24.64 − 19 =
  25. 25.23 + 24 =
  26. 26.Best estimate of 796 + 351? (a) 1200 (b) 1400 (c) 1000
  27. 27.1 + ? = 10
  28. 28.88 × 3 =
  29. 29.53 − 28 =
  30. 30.65 + 6 =
  31. 31.312 ÷ 8 =
  32. 32.18² =
  33. 33.2 + ? = 10
  34. 34.71 − 27 =
  35. 35.279 ÷ 9 =
  36. 36.81 + ? = 100
  37. 37.127 − 98 =
  38. 38.222 − 186 =
  39. 39.42 × 4 =
  40. 40.27² =

Answer key

  1. 42
  2. 169
  3. 198
  4. 29
  5. 98
  6. 44
  7. 192
  8. 26
  9. 225
  10. 150
  11. 62
  12. 42.5
  13. 87
  14. 121
  15. 12
  16. 26
  17. 53
  18. 20
  19. 664
  20. 6
  21. 24
  22. 23
  23. 46
  24. 45
  25. 47
  26. 1200
  27. 9
  28. 264
  29. 25
  30. 71
  31. 39
  32. 324
  33. 8
  34. 44
  35. 31
  36. 19
  37. 29
  38. 36
  39. 168
  40. 729

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