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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 115 · 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. 1.5% of ₹130 =
  2. 2.Half of 194 =
  3. 3.50% of ₹500 =
  4. 4.23 × 4 =
  5. 5.48 + ? = 100
  6. 6.You buy a pencil box for ₹17 and a pen for ₹28. You pay with a ₹100 note. How much change do you get, in rupees?
  7. 7.You buy a kite for ₹109 and pay with a ₹500 note. How much change do you get, in rupees?
  8. 8.317 − 280 =
  9. 9.60 + 71 =
  10. 10.26 + 25 =
  11. 11.You buy a water bottle for ₹39 and a pen for ₹17. You pay with a ₹100 note. How much change do you get, in rupees?
  12. 12.10% of ₹180 =
  13. 13.What is the remainder when 71 is divided by 6?
  14. 14.You buy a notebook for ₹44 and pay with a ₹100 note. How much change do you get, in rupees?
  15. 15.301 − 278 =
  16. 16.282 ÷ 6 =
  17. 17.72 − 45 =
  18. 18.1011 − 980 =
  19. 19.6 + ? = 10
  20. 20.Double 82 =
  21. 21.11² =
  22. 22.85 + 7 =
  23. 23.Best estimate of 297 + 278? (a) 400 (b) 600 (c) 800
  24. 24.1021 − 986 =
  25. 25.694 + 99 =
  26. 26.16 + 8 =
  27. 27.You buy a storybook for ₹28 and pay with a ₹100 note. How much change do you get, in rupees?
  28. 28.28 + 29 =
  29. 29.42 ÷ 3 =
  30. 30.122 − 77 =
  31. 31.45 + 9 =
  32. 32.24 + 29 =
  33. 33.5% of ₹850 =
  34. 34.19 + 18 =
  35. 35.68 + 8 =
  36. 36.2 + ? = 10
  37. 37.98 − 27 =
  38. 38.84 + 31 =
  39. 39.Best estimate of 20 × 27? (a) 60 (b) 6000 (c) 600
  40. 40.1013 − 981 =

Answer key

  1. 6.5
  2. 97
  3. 250
  4. 92
  5. 52
  6. 55
  7. 391
  8. 37
  9. 131
  10. 51
  11. 44
  12. 18
  13. 5
  14. 56
  15. 23
  16. 47
  17. 27
  18. 31
  19. 4
  20. 164
  21. 121
  22. 92
  23. 600
  24. 35
  25. 793
  26. 24
  27. 72
  28. 57
  29. 14
  30. 45
  31. 54
  32. 53
  33. 42.5
  34. 37
  35. 76
  36. 8
  37. 71
  38. 115
  39. 600
  40. 32

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