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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 638 · 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. 1.59 − 21 =
  2. 2.296 ÷ 8 =
  3. 3.13² =
  4. 4.23 + 24 =
  5. 5.67 × 4 =
  6. 6.Half of 150 =
  7. 7.Best estimate of 41 × 41? (a) 16000 (b) 160 (c) 1600
  8. 8.7 + ? = 10
  9. 9.You start your homework at 4:45 and finish at 7:55. How many minutes did you work?
  10. 10.Half of 110 =
  11. 11.17² =
  12. 12.27 × 4 =
  13. 13.212 ÷ 4 =
  14. 14.15 + 7 =
  15. 15.18 × 4 =
  16. 16.21 + 22 =
  17. 17.32 × 8 =
  18. 18.114 ÷ 3 =
  19. 19.A train leaves at 2:30 and reaches the next city at 5:20. How many minutes is the journey?
  20. 20.Half of 50 =
  21. 21.51 + 61 =
  22. 22.79 + ? = 100
  23. 23.548 − 99 =
  24. 24.30 + 32 =
  25. 25.68 − 34 =
  26. 26.87 + 8 =
  27. 27.15 × 4 =
  28. 28.72 − 44 =
  29. 29.54 + 73 =
  30. 30.108 − 84 =
  31. 31.23 + ? = 100
  32. 32.75 − 48 =
  33. 33.224 ÷ 4 =
  34. 34.216 ÷ 4 =
  35. 35.168 ÷ 6 =
  36. 36.24 + 26 =
  37. 37.97 − 77 =
  38. 38.7 + 8 =
  39. 39.1027 − 980 =
  40. 40.Double 96 =

Answer key

  1. 38
  2. 37
  3. 169
  4. 47
  5. 268
  6. 75
  7. 1600
  8. 3
  9. 190
  10. 55
  11. 289
  12. 108
  13. 53
  14. 22
  15. 72
  16. 43
  17. 256
  18. 38
  19. 170
  20. 25
  21. 112
  22. 21
  23. 449
  24. 62
  25. 34
  26. 95
  27. 60
  28. 28
  29. 127
  30. 24
  31. 77
  32. 27
  33. 56
  34. 54
  35. 28
  36. 50
  37. 20
  38. 15
  39. 47
  40. 192

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