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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 145 · 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.Half of 160 =
  2. 2.216 ÷ 4 =
  3. 3.27 + 5 =
  4. 4.29 + 9 =
  5. 5.12 × 6 =
  6. 6.60 − 26 =
  7. 7.79 + 8 =
  8. 8.53 − 34 =
  9. 9.69 + 19 =
  10. 10.62 − 19 =
  11. 11.28 + 29 =
  12. 12.12 × 7 =
  13. 13.87 − 18 =
  14. 14.99 − 21 =
  15. 15.28² =
  16. 16.74 × 9 =
  17. 17.105 − 82 =
  18. 18.657 ÷ 9 =
  19. 19.32 × 4 =
  20. 20.39 + 3 =
  21. 21.71 − 42 =
  22. 22.59 − 19 =
  23. 23.98 × 9 =
  24. 24.46 laddoos are packed in boxes of 3. How many laddoos are left over?
  25. 25.8 + 9 =
  26. 26.72 − 40 =
  27. 27.19 × 8 =
  28. 28.16 + 17 =
  29. 29.89 + 2 =
  30. 30.60 + 67 =
  31. 31.48 + 3 =
  32. 32.132 ÷ 3 =
  33. 33.46 + ? = 100
  34. 34.76 + 81 =
  35. 35.104 ÷ 4 =
  36. 36.440 ÷ 8 =
  37. 37.77 − 26 =
  38. 38.69 × 3 =
  39. 39.Best estimate of 708 + 843? (a) 1700 (b) 1500 (c) 1300
  40. 40.83 − 29 =

Answer key

  1. 80
  2. 54
  3. 32
  4. 38
  5. 72
  6. 34
  7. 87
  8. 19
  9. 88
  10. 43
  11. 57
  12. 84
  13. 69
  14. 78
  15. 784
  16. 666
  17. 23
  18. 73
  19. 128
  20. 42
  21. 29
  22. 40
  23. 882
  24. 1
  25. 17
  26. 32
  27. 152
  28. 33
  29. 91
  30. 127
  31. 51
  32. 44
  33. 54
  34. 157
  35. 26
  36. 55
  37. 51
  38. 207
  39. 1500
  40. 54

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