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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 925 · 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. 1.40 × 8 =
  2. 2.312 ÷ 8 =
  3. 3.65 × 4 =
  4. 4.25% of ₹430 =
  5. 5.You buy a notebook for ₹69 and pay with a ₹100 note. How much change do you get, in rupees?
  6. 6.77 − 12 =
  7. 7.303 − 281 =
  8. 8.288 ÷ 8 =
  9. 9.68 ÷ 4 =
  10. 10.280 ÷ 8 =
  11. 11.Double 71 =
  12. 12.35 + ? = 100
  13. 13.Half of 30 =
  14. 14.Best estimate of 86 × 18? (a) 180 (b) 1800 (c) 18000
  15. 15.6 + 5 =
  16. 16.24 × 8 =
  17. 17.220 ÷ 5 =
  18. 18.22 + 23 =
  19. 19.68 − 21 =
  20. 20.164 ÷ 4 =
  21. 21.Half of 150 =
  22. 22.93 − 13 =
  23. 23.46 + ? = 100
  24. 24.Double 36 =
  25. 25.Double 37 =
  26. 26.49 + ? = 100
  27. 27.47 × 4 =
  28. 28.55 × 5 =
  29. 29.94 × 7 =
  30. 30.121 − 96 =
  31. 31.114 children stand in rows of 8. How many full rows can they make?
  32. 32.22² =
  33. 33.15 × 8 =
  34. 34.66 + ? = 100
  35. 35.83 − 29 =
  36. 36.11² =
  37. 37.What is the remainder when 23 is divided by 4?
  38. 38.70 + 14 =
  39. 39.92 − 64 =
  40. 40.25 × 8 =

Answer key

  1. 320
  2. 39
  3. 260
  4. 107.5
  5. 31
  6. 65
  7. 22
  8. 36
  9. 17
  10. 35
  11. 142
  12. 65
  13. 15
  14. 1800
  15. 11
  16. 192
  17. 44
  18. 45
  19. 47
  20. 41
  21. 75
  22. 80
  23. 54
  24. 72
  25. 74
  26. 51
  27. 188
  28. 275
  29. 658
  30. 25
  31. 14
  32. 484
  33. 120
  34. 34
  35. 54
  36. 121
  37. 3
  38. 84
  39. 28
  40. 200

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