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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 759 · 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. 1.31 + 18 =
  2. 2.84 − 19 =
  3. 3.526 − 496 =
  4. 4.229 − 185 =
  5. 5.75 + ? = 100
  6. 6.63 − 17 =
  7. 7.58 × 4 =
  8. 8.Double 56 =
  9. 9.28 + 5 =
  10. 10.36 + 6 =
  11. 11.You start your homework at 6:30 and finish at 9:15. How many minutes did you work?
  12. 12.24 + 19 =
  13. 13.15 × 4 =
  14. 14.48 + 5 =
  15. 15.19 + 20 =
  16. 16.Best estimate of 23 × 70? (a) 14000 (b) 1400 (c) 140
  17. 17.9 + ? = 10
  18. 18.53 − 35 =
  19. 19.326 − 284 =
  20. 20.Best estimate of 56 × 31? (a) 18000 (b) 1800 (c) 180
  21. 21.88 + 4 =
  22. 22.26 × 4 =
  23. 23.58 children stand in rows of 9. How many full rows can they make?
  24. 24.Double 77 =
  25. 25.12² =
  26. 26.30 − 9 =
  27. 27.5% of ₹530 =
  28. 28.47 + 4 =
  29. 29.501 − 497 =
  30. 30.Best estimate of 703 + 726? (a) 1400 (b) 1600 (c) 1200
  31. 31.355 ÷ 5 =
  32. 32.5% of ₹80 =
  33. 33.8 + ? = 10
  34. 34.26 + 27 =
  35. 35.A cricket match starts at 2:45 and the first innings ends at 4:40. How many minutes did the innings last?
  36. 36.172 ÷ 4 =
  37. 37.Half of 180 =
  38. 38.87 × 3 =
  39. 39.Double 85 =
  40. 40.58 + 19 =

Answer key

  1. 49
  2. 65
  3. 30
  4. 44
  5. 25
  6. 46
  7. 232
  8. 112
  9. 33
  10. 42
  11. 165
  12. 43
  13. 60
  14. 53
  15. 39
  16. 1400
  17. 1
  18. 18
  19. 42
  20. 1800
  21. 92
  22. 104
  23. 6
  24. 154
  25. 144
  26. 21
  27. 26.5
  28. 51
  29. 4
  30. 1400
  31. 71
  32. 4
  33. 2
  34. 53
  35. 115
  36. 43
  37. 90
  38. 261
  39. 170
  40. 77

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