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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 691 · 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. 1.24² =
  2. 2.6 + 7 =
  3. 3.594 ÷ 6 =
  4. 4.9 + 8 =
  5. 5.31 + ? = 100
  6. 6.55 − 19 =
  7. 7.37 + 88 =
  8. 8.73 + 9 =
  9. 9.41 + ? = 100
  10. 10.21² =
  11. 11.Half of 132 =
  12. 12.19 × 8 =
  13. 13.56 + 19 =
  14. 14.40 + 29 =
  15. 15.Best estimate of 536 + 547? (a) 800 (b) 1200 (c) 1000
  16. 16.72 × 4 =
  17. 17.Best estimate of 33 × 39? (a) 120 (b) 12000 (c) 1200
  18. 18.What is the remainder when 51 is divided by 5?
  19. 19.Double 91 =
  20. 20.22 children stand in rows of 3. How many full rows can they make?
  21. 21.58 + 4 =
  22. 22.42 + 29 =
  23. 23.30 + 31 =
  24. 24.60 ÷ 4 =
  25. 25.30 + 9 =
  26. 26.95 − 38 =
  27. 27.Best estimate of 26 × 34? (a) 900 (b) 90 (c) 9000
  28. 28.17² =
  29. 29.You start your homework at 7:20 and finish at 7:55. How many minutes did you work?
  30. 30.Best estimate of 73 × 16? (a) 14000 (b) 1400 (c) 140
  31. 31.209 − 189 =
  32. 32.66 − 19 =
  33. 33.50% of ₹300 =
  34. 34.Half of 76 =
  35. 35.60 − 44 =
  36. 36.168 ÷ 4 =
  37. 37.39 × 8 =
  38. 38.A cricket match starts at 2:55 and the first innings ends at 4:50. How many minutes did the innings last?
  39. 39.37 − 9 =
  40. 40.67 − 29 =

Answer key

  1. 576
  2. 13
  3. 99
  4. 17
  5. 69
  6. 36
  7. 125
  8. 82
  9. 59
  10. 441
  11. 66
  12. 152
  13. 75
  14. 69
  15. 1000
  16. 288
  17. 1200
  18. 1
  19. 182
  20. 7
  21. 62
  22. 71
  23. 61
  24. 15
  25. 39
  26. 57
  27. 900
  28. 289
  29. 35
  30. 1400
  31. 20
  32. 47
  33. 150
  34. 38
  35. 16
  36. 42
  37. 312
  38. 115
  39. 28
  40. 38

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