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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 37 · 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. 1.22² =
  2. 2.112 ÷ 8 =
  3. 3.66 − 54 =
  4. 4.256 ÷ 8 =
  5. 5.59 + ? = 100
  6. 6.Half of 100 =
  7. 7.51 × 4 =
  8. 8.25² =
  9. 9.12² =
  10. 10.Best estimate of 600 + 531? (a) 900 (b) 1300 (c) 1100
  11. 11.248 ÷ 8 =
  12. 12.25% of ₹50 =
  13. 13.245 ÷ 5 =
  14. 14.136 ÷ 8 =
  15. 15.50% of ₹730 =
  16. 16.11 + 12 =
  17. 17.99 ÷ 3 =
  18. 18.5% of ₹40 =
  19. 19.74 + 53 =
  20. 20.59 × 6 =
  21. 21.44 + 9 =
  22. 22.19 × 4 =
  23. 23.87 + 7 =
  24. 24.14² =
  25. 25.27 × 9 =
  26. 26.17 + 4 =
  27. 27.49 × 5 =
  28. 28.27 + 26 =
  29. 29.29 + 6 =
  30. 30.Best estimate of 93 × 40? (a) 36000 (b) 3600 (c) 360
  31. 31.23 + 22 =
  32. 32.320 ÷ 5 =
  33. 33.122 children stand in rows of 8. How many full rows can they make?
  34. 34.55 + 6 =
  35. 35.76 + ? = 100
  36. 36.A train leaves at 4:55 and reaches the next city at 5:30. How many minutes is the journey?
  37. 37.You buy a storybook for ₹16 and a pen for ₹28. You pay with a ₹100 note. How much change do you get, in rupees?
  38. 38.68 − 55 =
  39. 39.Best estimate of 577 + 666? (a) 1100 (b) 1500 (c) 1300
  40. 40.12 × 8 =

Answer key

  1. 484
  2. 14
  3. 12
  4. 32
  5. 41
  6. 50
  7. 204
  8. 625
  9. 144
  10. 1100
  11. 31
  12. 12.5
  13. 49
  14. 17
  15. 365
  16. 23
  17. 33
  18. 2
  19. 127
  20. 354
  21. 53
  22. 76
  23. 94
  24. 196
  25. 243
  26. 21
  27. 245
  28. 53
  29. 35
  30. 3600
  31. 45
  32. 64
  33. 15
  34. 61
  35. 24
  36. 35
  37. 56
  38. 13
  39. 1300
  40. 96

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