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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 686 · 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. 1.86 + 7 =
  2. 2.59 + 37 =
  3. 3.What is the remainder when 36 is divided by 5?
  4. 4.204 ÷ 3 =
  5. 5.67 + ? = 100
  6. 6.2 + ? = 10
  7. 7.64 × 5 =
  8. 8.43 − 19 =
  9. 9.55 − 37 =
  10. 10.114 − 83 =
  11. 11.49 + 15 =
  12. 12.9 + 8 =
  13. 13.66 − 29 =
  14. 14.Double 69 =
  15. 15.33 × 8 =
  16. 16.57 − 19 =
  17. 17.305 − 293 =
  18. 18.17 + 9 =
  19. 19.427 ÷ 7 =
  20. 20.31 − 9 =
  21. 21.104 − 55 =
  22. 22.Best estimate of 49 × 78? (a) 4000 (b) 400 (c) 40000
  23. 23.85 + ? = 100
  24. 24.Best estimate of 23 × 82? (a) 16000 (b) 160 (c) 1600
  25. 25.45 + 6 =
  26. 26.57 + 21 =
  27. 27.You buy a pencil box for ₹111 and pay with a ₹500 note. How much change do you get, in rupees?
  28. 28.6 + ? = 10
  29. 29.52 ÷ 4 =
  30. 30.656 ÷ 8 =
  31. 31.15² =
  32. 32.96 ÷ 8 =
  33. 33.71 + 9 =
  34. 34.25% of ₹100 =
  35. 35.You buy a bag of mangoes for ₹50 and pay with a ₹100 note. How much change do you get, in rupees?
  36. 36.105 ÷ 5 =
  37. 37.13 × 7 =
  38. 38.A train leaves at 3:15 and reaches the next city at 4:00. How many minutes is the journey?
  39. 39.Best estimate of 46 × 29? (a) 150 (b) 15000 (c) 1500
  40. 40.59 + 86 =

Answer key

  1. 93
  2. 96
  3. 1
  4. 68
  5. 33
  6. 8
  7. 320
  8. 24
  9. 18
  10. 31
  11. 64
  12. 17
  13. 37
  14. 138
  15. 264
  16. 38
  17. 12
  18. 26
  19. 61
  20. 22
  21. 49
  22. 4000
  23. 15
  24. 1600
  25. 51
  26. 78
  27. 389
  28. 4
  29. 13
  30. 82
  31. 225
  32. 12
  33. 80
  34. 25
  35. 50
  36. 21
  37. 91
  38. 45
  39. 1500
  40. 145

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