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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 723 · 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. 1.79 + 9 =
  2. 2.Half of 32 =
  3. 3.135 ÷ 3 =
  4. 4.209 − 194 =
  5. 5.72 + ? = 100
  6. 6.52 + 9 =
  7. 7.503 − 99 =
  8. 8.109 − 96 =
  9. 9.228 − 186 =
  10. 10.26 + 5 =
  11. 11.Best estimate of 452 + 630? (a) 1300 (b) 900 (c) 1100
  12. 12.54 children stand in rows of 5. How many full rows can they make?
  13. 13.A cricket match starts at 8:00 and the first innings ends at 9:35. How many minutes did the innings last?
  14. 14.Best estimate of 66 × 19? (a) 14000 (b) 140 (c) 1400
  15. 15.76 + 9 =
  16. 16.58 × 5 =
  17. 17.65 + 51 =
  18. 18.192 ÷ 4 =
  19. 19.10 + 9 =
  20. 20.69 + ? = 100
  21. 21.27 × 8 =
  22. 22.21 × 4 =
  23. 23.55 + 29 =
  24. 24.11 + 10 =
  25. 25.5% of ₹460 =
  26. 26.You buy a pencil box for ₹311 and pay with a ₹500 note. How much change do you get, in rupees?
  27. 27.63 − 19 =
  28. 28.33 + ? = 100
  29. 29.Double 27 =
  30. 30.168 ÷ 4 =
  31. 31.5% of ₹120 =
  32. 32.16² =
  33. 33.29 + 28 =
  34. 34.128 − 95 =
  35. 35.15 × 8 =
  36. 36.33 − 19 =
  37. 37.Best estimate of 90 × 33? (a) 27000 (b) 2700 (c) 270
  38. 38.25% of ₹530 =
  39. 39.28² =
  40. 40.515 − 490 =

Answer key

  1. 88
  2. 16
  3. 45
  4. 15
  5. 28
  6. 61
  7. 404
  8. 13
  9. 42
  10. 31
  11. 1100
  12. 10
  13. 95
  14. 1400
  15. 85
  16. 290
  17. 116
  18. 48
  19. 19
  20. 31
  21. 216
  22. 84
  23. 84
  24. 21
  25. 23
  26. 189
  27. 44
  28. 67
  29. 54
  30. 42
  31. 6
  32. 256
  33. 57
  34. 33
  35. 120
  36. 14
  37. 2700
  38. 132.5
  39. 784
  40. 25

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