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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 284 · 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. 1.528 − 479 =
  2. 2.13 + 19 =
  3. 3.16 + 15 =
  4. 4.51 − 45 =
  5. 5.Best estimate of 89 × 82? (a) 7200 (b) 720 (c) 72000
  6. 6.16 + ? = 100
  7. 7.53 + 44 =
  8. 8.49 + 7 =
  9. 9.508 − 495 =
  10. 10.521 − 483 =
  11. 11.48 + 74 =
  12. 12.Double 73 =
  13. 13.85 − 73 =
  14. 14.95 − 66 =
  15. 15.60 − 46 =
  16. 16.26 + 5 =
  17. 17.14 × 8 =
  18. 18.210 − 187 =
  19. 19.59 × 5 =
  20. 20.780 − 99 =
  21. 21.67 + 7 =
  22. 22.What is the remainder when 111 is divided by 9?
  23. 23.25% of ₹270 =
  24. 24.What is the remainder when 68 is divided by 5?
  25. 25.12 × 8 =
  26. 26.224 ÷ 8 =
  27. 27.10 + 9 =
  28. 28.You buy a storybook for ₹283 and pay with a ₹500 note. How much change do you get, in rupees?
  29. 29.780 + 99 =
  30. 30.48 × 6 =
  31. 31.27² =
  32. 32.317 − 297 =
  33. 33.84 − 65 =
  34. 34.48 + ? = 100
  35. 35.Best estimate of 466 + 131? (a) 800 (b) 400 (c) 600
  36. 36.8 + 10 =
  37. 37.8 + 4 =
  38. 38.402 + 99 =
  39. 39.4 + ? = 10
  40. 40.168 ÷ 4 =

Answer key

  1. 49
  2. 32
  3. 31
  4. 6
  5. 7200
  6. 84
  7. 97
  8. 56
  9. 13
  10. 38
  11. 122
  12. 146
  13. 12
  14. 29
  15. 14
  16. 31
  17. 112
  18. 23
  19. 295
  20. 681
  21. 74
  22. 3
  23. 67.5
  24. 3
  25. 96
  26. 28
  27. 19
  28. 217
  29. 879
  30. 288
  31. 729
  32. 20
  33. 19
  34. 52
  35. 600
  36. 18
  37. 12
  38. 501
  39. 6
  40. 42

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