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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 270 · 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. 1.96 − 36 =
  2. 2.144 ÷ 8 =
  3. 3.Best estimate of 41 × 92? (a) 360 (b) 36000 (c) 3600
  4. 4.176 ÷ 8 =
  5. 5.47 × 4 =
  6. 6.59 + 9 =
  7. 7.85 + 7 =
  8. 8.You start your homework at 5:20 and finish at 5:55. How many minutes did you work?
  9. 9.You buy a storybook for ₹87 and pay with a ₹100 note. How much change do you get, in rupees?
  10. 10.13 + 9 =
  11. 11.71 + ? = 100
  12. 12.You buy a cricket ball for ₹67 and pay with a ₹100 note. How much change do you get, in rupees?
  13. 13.32 × 4 =
  14. 14.62 − 9 =
  15. 15.323 − 284 =
  16. 16.Best estimate of 673 + 223? (a) 700 (b) 1100 (c) 900
  17. 17.3 + ? = 10
  18. 18.87 + 8 =
  19. 19.77 − 41 =
  20. 20.83 + 44 =
  21. 21.42 ÷ 3 =
  22. 22.60 + 61 =
  23. 23.Half of 158 =
  24. 24.58 + 8 =
  25. 25.84 × 5 =
  26. 26.4 + ? = 10
  27. 27.51 + 66 =
  28. 28.28 + 29 =
  29. 29.Double 46 =
  30. 30.7 + ? = 10
  31. 31.Best estimate of 58 × 34? (a) 18000 (b) 1800 (c) 180
  32. 32.21² =
  33. 33.57 × 4 =
  34. 34.98 − 75 =
  35. 35.24² =
  36. 36.6 + ? = 10
  37. 37.29² =
  38. 38.67 + ? = 100
  39. 39.39 + ? = 100
  40. 40.256 ÷ 8 =

Answer key

  1. 60
  2. 18
  3. 3600
  4. 22
  5. 188
  6. 68
  7. 92
  8. 35
  9. 13
  10. 22
  11. 29
  12. 33
  13. 128
  14. 53
  15. 39
  16. 900
  17. 7
  18. 95
  19. 36
  20. 127
  21. 14
  22. 121
  23. 79
  24. 66
  25. 420
  26. 6
  27. 117
  28. 57
  29. 92
  30. 3
  31. 1800
  32. 441
  33. 228
  34. 23
  35. 576
  36. 4
  37. 841
  38. 33
  39. 61
  40. 32

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