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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 155 · 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.A cricket match starts at 1:10 and the first innings ends at 4:00. How many minutes did the innings last?
  2. 2.15 × 8 =
  3. 3.85 + 71 =
  4. 4.521 − 478 =
  5. 5.91 − 31 =
  6. 6.96 ÷ 8 =
  7. 7.53 + ? = 100
  8. 8.19² =
  9. 9.115 − 84 =
  10. 10.1014 − 982 =
  11. 11.96 ÷ 4 =
  12. 12.27 + 88 =
  13. 13.5% of ₹230 =
  14. 14.4 + ? = 10
  15. 15.216 ÷ 4 =
  16. 16.100 ÷ 4 =
  17. 17.Best estimate of 239 + 192? (a) 400 (b) 200 (c) 600
  18. 18.6 + 7 =
  19. 19.17 × 8 =
  20. 20.205 − 191 =
  21. 21.13 + 12 =
  22. 22.63 + 16 =
  23. 23.26 × 8 =
  24. 24.144 ÷ 4 =
  25. 25.16² =
  26. 26.Best estimate of 42 × 46? (a) 2000 (b) 20000 (c) 200
  27. 27.12 + 11 =
  28. 28.Best estimate of 34 × 91? (a) 27000 (b) 270 (c) 2700
  29. 29.You start your homework at 3:40 and finish at 4:55. How many minutes did you work?
  30. 30.470 + 99 =
  31. 31.56 + ? = 100
  32. 32.168 ÷ 8 =
  33. 33.26 + 43 =
  34. 34.What is the remainder when 22 is divided by 4?
  35. 35.43 × 7 =
  36. 36.Double 25 =
  37. 37.A train leaves at 1:20 and reaches the next city at 4:05. How many minutes is the journey?
  38. 38.168 ÷ 4 =
  39. 39.48 + 5 =
  40. 40.22² =

Answer key

  1. 170
  2. 120
  3. 156
  4. 43
  5. 60
  6. 12
  7. 47
  8. 361
  9. 31
  10. 32
  11. 24
  12. 115
  13. 11.5
  14. 6
  15. 54
  16. 25
  17. 400
  18. 13
  19. 136
  20. 14
  21. 25
  22. 79
  23. 208
  24. 36
  25. 256
  26. 2000
  27. 23
  28. 2700
  29. 75
  30. 569
  31. 44
  32. 21
  33. 69
  34. 2
  35. 301
  36. 50
  37. 165
  38. 42
  39. 53
  40. 484

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