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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 893 · 40 questions
TalentJR

How to solve it (Same number of places): Add zeros at the end so every decimal has the same number of places (0.5 = 0.500). Compare or add them like whole numbers, keeping the decimal points in a line. Place value after the point: tenths (0.1), hundredths (0.01), thousandths (0.001).

NameDateTime takenScore ___ / 40
  1. 1.8.31 + 7.3 = ? (a) 15.71 (b) 9.04 (c) 15.51 (d) 15.61
  2. 2.1.25 + 9.2 = ? (a) 10.35 (b) 2.17 (c) 10.55 (d) 10.45
  3. 3.8.02 + 7.8 = ? (a) 8.8 (b) 15.92 (c) 15.72 (d) 15.82
  4. 4.7.13 + 7.7 = ? (a) 7.9 (b) 14.83 (c) 14.73 (d) 14.93
  5. 5.What is the value of the digit 7 in 31.765? (a) 7 (b) 0.07 (c) 0.7 (d) 0.007
  6. 6.What is the value of the digit 3 in 89.463? (a) 0.03 (b) 0.3 (c) 3 (d) 0.003
  7. 7.What is the value of the digit 6 in 63.149? (a) 6 (b) 60 (c) 0.06 (d) 0.6
  8. 8.Which is the smallest: 0.38, 0.3, 0.063, 0.283? (a) 0.38 (b) 0.3 (c) 0.063 (d) 0.283
  9. 9.What is the value of the digit 2 in 29.813? (a) 20 (b) 0.02 (c) 0.2 (d) 2
  10. 10.8.95 + 5.6 = ? (a) 14.45 (b) 9.51 (c) 14.65 (d) 14.55
  11. 11.Which is the smallest: 0.55, 0.471, 0.5, 0.025? (a) 0.55 (b) 0.471 (c) 0.5 (d) 0.025
  12. 12.7.74 + 9.5 = ? (a) 8.69 (b) 17.14 (c) 17.24 (d) 17.34
  13. 13.Which is the smallest: 0.142, 0.2, 0.062, 0.25? (a) 0.142 (b) 0.2 (c) 0.062 (d) 0.25
  14. 14.9.38 + 2.2 = ? (a) 11.58 (b) 11.48 (c) 9.6 (d) 11.68
  15. 15.Which is the smallest: 0.068, 0.6, 0.61, 0.596? (a) 0.068 (b) 0.6 (c) 0.61 (d) 0.596
  16. 16.1.16 + 1.7 = ? (a) 2.76 (b) 2.96 (c) 2.86 (d) 1.33
  17. 17.What is the value of the digit 6 in 79.651? (a) 0.006 (b) 0.6 (c) 6 (d) 0.06
  18. 18.Which is the greatest: 0.048, 0.8, 0.725, 0.85? (a) 0.048 (b) 0.8 (c) 0.725 (d) 0.85
  19. 19.4.45 + 9.3 = ? (a) 13.65 (b) 5.38 (c) 13.85 (d) 13.75
  20. 20.8.91 + 8.6 = ? (a) 9.77 (b) 17.61 (c) 17.41 (d) 17.51
  21. 21.3.72 + 6.1 = ? (a) 4.33 (b) 9.92 (c) 9.82 (d) 9.72
  22. 22.8.53 + 5.4 = ? (a) 9.07 (b) 13.83 (c) 13.93 (d) 14.03
  23. 23.Which is the greatest: 0.084, 0.71, 0.622, 0.7? (a) 0.084 (b) 0.71 (c) 0.622 (d) 0.7
  24. 24.6.69 + 5.4 = ? (a) 12.09 (b) 12.19 (c) 11.99 (d) 7.23
  25. 25.Which is the greatest: 0.052, 0.38, 0.3, 0.247? (a) 0.052 (b) 0.38 (c) 0.3 (d) 0.247
  26. 26.2.33 + 3.4 = ? (a) 2.67 (b) 5.63 (c) 5.83 (d) 5.73
  27. 27.What is the value of the digit 1 in 47.361? (a) 1 (b) 0.01 (c) 0.001 (d) 0.1
  28. 28.What is the value of the digit 1 in 71.862? (a) 0.1 (b) 0.01 (c) 1 (d) 10
  29. 29.Which is the greatest: 0.085, 0.7, 0.73, 0.675? (a) 0.085 (b) 0.7 (c) 0.73 (d) 0.675
  30. 30.Which is the greatest: 0.7, 0.78, 0.097, 0.616? (a) 0.7 (b) 0.78 (c) 0.097 (d) 0.616
  31. 31.What is the value of the digit 5 in 24.593? (a) 5 (b) 0.5 (c) 0.05 (d) 0.005
  32. 32.What is the value of the digit 4 in 43.687? (a) 4 (b) 0.04 (c) 0.4 (d) 40
  33. 33.What is the value of the digit 1 in 19.854? (a) 0.1 (b) 10 (c) 1 (d) 0.01
  34. 34.What is the value of the digit 9 in 47.296? (a) 9 (b) 0.009 (c) 0.09 (d) 0.9
  35. 35.9.28 + 1.2 = ? (a) 9.4 (b) 10.38 (c) 10.58 (d) 10.48
  36. 36.6.31 + 9.7 = ? (a) 7.28 (b) 16.01 (c) 15.91 (d) 16.11
  37. 37.Which is the greatest: 0.2, 0.23, 0.042, 0.144? (a) 0.2 (b) 0.23 (c) 0.042 (d) 0.144
  38. 38.What is the value of the digit 9 in 39.152? (a) 9 (b) 90 (c) 0.09 (d) 0.9
  39. 39.2.36 + 1.2 = ? (a) 3.56 (b) 3.66 (c) 2.48 (d) 3.46
  40. 40.Which is the smallest: 0.253, 0.081, 0.34, 0.3? (a) 0.253 (b) 0.081 (c) 0.34 (d) 0.3

Answer key

  1. 15.61
  2. 10.45
  3. 15.82
  4. 14.83
  5. 0.7
  6. 0.003
  7. 60
  8. 0.063
  9. 20
  10. 14.55
  11. 0.025
  12. 17.24
  13. 0.062
  14. 11.58
  15. 0.068
  16. 2.86
  17. 0.6
  18. 0.85
  19. 13.75
  20. 17.51
  21. 9.82
  22. 13.93
  23. 0.71
  24. 12.09
  25. 0.38
  26. 5.73
  27. 0.001
  28. 1
  29. 0.73
  30. 0.78
  31. 0.5
  32. 40
  33. 10
  34. 0.09
  35. 10.48
  36. 16.01
  37. 0.23
  38. 9
  39. 3.56
  40. 0.081

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