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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 424 · 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. 1.77 + 49 =
  2. 2.3 + ? = 10
  3. 3.50 + ? = 100
  4. 4.17 × 8 =
  5. 5.Best estimate of 86 × 76? (a) 7200 (b) 720 (c) 72000
  6. 6.14² =
  7. 7.21 + 20 =
  8. 8.81 − 63 =
  9. 9.Half of 26 =
  10. 10.What is the remainder when 47 is divided by 3?
  11. 11.27 + 8 =
  12. 12.13 × 3 =
  13. 13.27 + 19 =
  14. 14.1 + ? = 10
  15. 15.58 − 26 =
  16. 16.18 + 9 =
  17. 17.82 − 59 =
  18. 18.32 × 4 =
  19. 19.Double 82 =
  20. 20.Double 39 =
  21. 21.68 − 43 =
  22. 22.24 × 8 =
  23. 23.37 × 8 =
  24. 24.You start your homework at 4:00 and finish at 7:00. How many minutes did you work?
  25. 25.70 − 51 =
  26. 26.86 + 9 =
  27. 27.7 + 6 =
  28. 28.66 × 4 =
  29. 29.16 laddoos are packed in boxes of 3. How many laddoos are left over?
  30. 30.543 − 99 =
  31. 31.68 + 8 =
  32. 32.74 + 29 =
  33. 33.5% of ₹850 =
  34. 34.You buy a notebook for ₹15 and pay with a ₹100 note. How much change do you get, in rupees?
  35. 35.What is the remainder when 110 is divided by 8?
  36. 36.Best estimate of 263 + 355? (a) 900 (b) 500 (c) 700
  37. 37.1016 − 978 =
  38. 38.126 ÷ 3 =
  39. 39.Best estimate of 87 × 86? (a) 81000 (b) 810 (c) 8100
  40. 40.You buy a notebook for ₹467 and pay with a ₹500 note. How much change do you get, in rupees?

Answer key

  1. 126
  2. 7
  3. 50
  4. 136
  5. 7200
  6. 196
  7. 41
  8. 18
  9. 13
  10. 2
  11. 35
  12. 39
  13. 46
  14. 9
  15. 32
  16. 27
  17. 23
  18. 128
  19. 164
  20. 78
  21. 25
  22. 192
  23. 296
  24. 180
  25. 19
  26. 95
  27. 13
  28. 264
  29. 1
  30. 444
  31. 76
  32. 103
  33. 42.5
  34. 85
  35. 6
  36. 700
  37. 38
  38. 42
  39. 8100
  40. 33

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