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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 783 · 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. 1.25² =
  2. 2.517 − 478 =
  3. 3.13 + 14 =
  4. 4.75 − 19 =
  5. 5.A film starts at 6:35 and ends at 9:20. How many minutes long is the film?
  6. 6.34 + 41 =
  7. 7.73 − 27 =
  8. 8.20 × 8 =
  9. 9.17 + 6 =
  10. 10.14 + ? = 100
  11. 11.79 + 28 =
  12. 12.59 × 5 =
  13. 13.13² =
  14. 14.27 + 73 =
  15. 15.256 ÷ 8 =
  16. 16.You buy a storybook for ₹246 and pay with a ₹500 note. How much change do you get, in rupees?
  17. 17.81 + ? = 100
  18. 18.23 − 19 =
  19. 19.2 + ? = 10
  20. 20.Best estimate of 682 + 359? (a) 900 (b) 1300 (c) 1100
  21. 21.88 + 28 =
  22. 22.19 × 8 =
  23. 23.78 + 8 =
  24. 24.50% of ₹360 =
  25. 25.18 × 8 =
  26. 26.84 − 9 =
  27. 27.Double 96 =
  28. 28.39 + 4 =
  29. 29.232 ÷ 8 =
  30. 30.11 + 10 =
  31. 31.10 + 11 =
  32. 32.50% of ₹860 =
  33. 33.74 children stand in rows of 6. How many full rows can they make?
  34. 34.112 ÷ 8 =
  35. 35.Double 82 =
  36. 36.7 + 9 =
  37. 37.You buy a pencil box for ₹12 and pay with a ₹100 note. How much change do you get, in rupees?
  38. 38.50 + 29 =
  39. 39.A cricket match starts at 5:45 and the first innings ends at 8:55. How many minutes did the innings last?
  40. 40.6 + 8 =

Answer key

  1. 625
  2. 39
  3. 27
  4. 56
  5. 165
  6. 75
  7. 46
  8. 160
  9. 23
  10. 86
  11. 107
  12. 295
  13. 169
  14. 100
  15. 32
  16. 254
  17. 19
  18. 4
  19. 8
  20. 1100
  21. 116
  22. 152
  23. 86
  24. 180
  25. 144
  26. 75
  27. 192
  28. 43
  29. 29
  30. 21
  31. 21
  32. 430
  33. 12
  34. 14
  35. 164
  36. 16
  37. 88
  38. 79
  39. 190
  40. 14

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