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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 567 · 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. 1.19 + 5 =
  2. 2.Double 47 =
  3. 3.62 + ? = 100
  4. 4.67 − 16 =
  5. 5.117 − 97 =
  6. 6.37 + 8 =
  7. 7.22 × 8 =
  8. 8.62 − 18 =
  9. 9.32 + 23 =
  10. 10.25% of ₹260 =
  11. 11.59 − 12 =
  12. 12.Best estimate of 50 × 39? (a) 20000 (b) 200 (c) 2000
  13. 13.81 + 48 =
  14. 14.60 × 4 =
  15. 15.168 ÷ 4 =
  16. 16.240 ÷ 8 =
  17. 17.4 + ? = 10
  18. 18.661 + 99 =
  19. 19.A train leaves at 2:50 and reaches the next city at 3:20. How many minutes is the journey?
  20. 20.160 ÷ 4 =
  21. 21.21² =
  22. 22.10% of ₹200 =
  23. 23.28² =
  24. 24.45 + ? = 100
  25. 25.306 − 280 =
  26. 26.18² =
  27. 27.A train leaves at 3:20 and reaches the next city at 5:10. How many minutes is the journey?
  28. 28.15 + 17 =
  29. 29.36 + 9 =
  30. 30.Best estimate of 46 × 36? (a) 200 (b) 2000 (c) 20000
  31. 31.77 + 78 =
  32. 32.48 ÷ 4 =
  33. 33.1015 − 993 =
  34. 34.236 + 99 =
  35. 35.Best estimate of 83 × 81? (a) 640 (b) 64000 (c) 6400
  36. 36.7 + 9 =
  37. 37.A film starts at 4:20 and ends at 4:50. How many minutes long is the film?
  38. 38.18 × 8 =
  39. 39.56 + 9 =
  40. 40.32 children stand in rows of 3. How many full rows can they make?

Answer key

  1. 24
  2. 94
  3. 38
  4. 51
  5. 20
  6. 45
  7. 176
  8. 44
  9. 55
  10. 65
  11. 47
  12. 2000
  13. 129
  14. 240
  15. 42
  16. 30
  17. 6
  18. 760
  19. 30
  20. 40
  21. 441
  22. 20
  23. 784
  24. 55
  25. 26
  26. 324
  27. 110
  28. 32
  29. 45
  30. 2000
  31. 155
  32. 12
  33. 22
  34. 335
  35. 6400
  36. 16
  37. 30
  38. 144
  39. 65
  40. 10

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