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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 922 · 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. 1.58 − 34 =
  2. 2.3 + ? = 10
  3. 3.66 − 25 =
  4. 4.22 + 23 =
  5. 5.64 − 32 =
  6. 6.12 + ? = 100
  7. 7.65 − 9 =
  8. 8.54 − 43 =
  9. 9.104 ÷ 8 =
  10. 10.You buy a storybook for ₹26 and a pen for ₹43. You pay with a ₹100 note. How much change do you get, in rupees?
  11. 11.Half of 38 =
  12. 12.Half of 100 =
  13. 13.46 + 9 =
  14. 14.12² =
  15. 15.Double 77 =
  16. 16.96 ÷ 8 =
  17. 17.Best estimate of 574 + 346? (a) 1100 (b) 700 (c) 900
  18. 18.12 × 8 =
  19. 19.27 + 29 =
  20. 20.30 + 31 =
  21. 21.118 − 85 =
  22. 22.5% of ₹890 =
  23. 23.Double 39 =
  24. 24.What is the remainder when 59 is divided by 8?
  25. 25.245 ÷ 7 =
  26. 26.27 + 28 =
  27. 27.Best estimate of 149 + 416? (a) 700 (b) 300 (c) 500
  28. 28.30 − 19 =
  29. 29.6 + 5 =
  30. 30.You buy a notebook for ₹35 and a pen for ₹18. You pay with a ₹100 note. How much change do you get, in rupees?
  31. 31.55 − 48 =
  32. 32.9 + ? = 10
  33. 33.69 + 29 =
  34. 34.26 + 6 =
  35. 35.240 ÷ 8 =
  36. 36.39 + 4 =
  37. 37.85 + ? = 100
  38. 38.33 × 4 =
  39. 39.93 × 7 =
  40. 40.21² =

Answer key

  1. 24
  2. 7
  3. 41
  4. 45
  5. 32
  6. 88
  7. 56
  8. 11
  9. 13
  10. 31
  11. 19
  12. 50
  13. 55
  14. 144
  15. 154
  16. 12
  17. 900
  18. 96
  19. 56
  20. 61
  21. 33
  22. 44.5
  23. 78
  24. 3
  25. 35
  26. 55
  27. 500
  28. 11
  29. 11
  30. 47
  31. 7
  32. 1
  33. 98
  34. 32
  35. 30
  36. 43
  37. 15
  38. 132
  39. 651
  40. 441

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