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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 13 · 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 ₹100 =
  2. 2.135 ÷ 5 =
  3. 3.8 + 10 =
  4. 4.45 − 19 =
  5. 5.3 + ? = 10
  6. 6.A cricket match starts at 3:40 and the first innings ends at 6:05. How many minutes did the innings last?
  7. 7.54 + ? = 100
  8. 8.79 + 9 =
  9. 9.2 + ? = 10
  10. 10.43 + 19 =
  11. 11.23² =
  12. 12.Double 17 =
  13. 13.Double 74 =
  14. 14.13 × 8 =
  15. 15.50% of ₹580 =
  16. 16.160 ÷ 8 =
  17. 17.22 + 18 =
  18. 18.59 − 17 =
  19. 19.19 + 20 =
  20. 20.10 + 11 =
  21. 21.75 − 19 =
  22. 22.37 + 78 =
  23. 23.236 ÷ 4 =
  24. 24.209 + 99 =
  25. 25.67 + 33 =
  26. 26.What is the remainder when 38 is divided by 5?
  27. 27.21² =
  28. 28.124 ÷ 4 =
  29. 29.77 + 7 =
  30. 30.Half of 42 =
  31. 31.5 + ? = 10
  32. 32.Best estimate of 596 + 652? (a) 1500 (b) 1300 (c) 1100
  33. 33.27 + 5 =
  34. 34.59 + 4 =
  35. 35.43 + 31 =
  36. 36.19 + 21 =
  37. 37.99 − 25 =
  38. 38.Half of 138 =
  39. 39.Best estimate of 56 × 12? (a) 600 (b) 60 (c) 6000
  40. 40.Best estimate of 47 × 39? (a) 20000 (b) 2000 (c) 200

Answer key

  1. 5
  2. 27
  3. 18
  4. 26
  5. 7
  6. 145
  7. 46
  8. 88
  9. 8
  10. 62
  11. 529
  12. 34
  13. 148
  14. 104
  15. 290
  16. 20
  17. 40
  18. 42
  19. 39
  20. 21
  21. 56
  22. 115
  23. 59
  24. 308
  25. 100
  26. 3
  27. 441
  28. 31
  29. 84
  30. 21
  31. 5
  32. 1300
  33. 32
  34. 63
  35. 74
  36. 40
  37. 74
  38. 69
  39. 600
  40. 2000

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