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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 313 · 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.Best estimate of 47 × 32? (a) 1500 (b) 150 (c) 15000
  2. 2.18 + 19 =
  3. 3.22 + 23 =
  4. 4.15² =
  5. 5.452 + 99 =
  6. 6.16² =
  7. 7.67 × 3 =
  8. 8.Double 75 =
  9. 9.You start your homework at 6:50 and finish at 7:25. How many minutes did you work?
  10. 10.196 ÷ 4 =
  11. 11.206 − 192 =
  12. 12.59 × 8 =
  13. 13.41 + ? = 100
  14. 14.Best estimate of 316 + 168? (a) 500 (b) 700 (c) 300
  15. 15.160 ÷ 8 =
  16. 16.10% of ₹620 =
  17. 17.15 + 9 =
  18. 18.65 + 9 =
  19. 19.22 + 21 =
  20. 20.You start your homework at 3:40 and finish at 5:50. How many minutes did you work?
  21. 21.48 + ? = 100
  22. 22.21² =
  23. 23.45 × 4 =
  24. 24.42 ÷ 3 =
  25. 25.Best estimate of 82 × 40? (a) 320 (b) 3200 (c) 32000
  26. 26.25% of ₹40 =
  27. 27.83 × 6 =
  28. 28.1020 − 989 =
  29. 29.7 + 5 =
  30. 30.68 + 84 =
  31. 31.A film starts at 2:00 and ends at 4:45. How many minutes long is the film?
  32. 32.56 × 4 =
  33. 33.221 − 197 =
  34. 34.Best estimate of 409 + 875? (a) 1300 (b) 1500 (c) 1100
  35. 35.14² =
  36. 36.Best estimate of 500 + 123? (a) 800 (b) 400 (c) 600
  37. 37.26 + 21 =
  38. 38.5% of ₹680 =
  39. 39.66 − 21 =
  40. 40.Half of 28 =

Answer key

  1. 1500
  2. 37
  3. 45
  4. 225
  5. 551
  6. 256
  7. 201
  8. 150
  9. 35
  10. 49
  11. 14
  12. 472
  13. 59
  14. 500
  15. 20
  16. 62
  17. 24
  18. 74
  19. 43
  20. 130
  21. 52
  22. 441
  23. 180
  24. 14
  25. 3200
  26. 10
  27. 498
  28. 31
  29. 12
  30. 152
  31. 165
  32. 224
  33. 24
  34. 1300
  35. 196
  36. 600
  37. 47
  38. 34
  39. 45
  40. 14

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