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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 420 · 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. 1.9.99 + 1.3 = ? (a) 11.29 (b) 10.12 (c) 11.19 (d) 11.39
  2. 2.2.99 + 3.6 = ? (a) 6.69 (b) 3.35 (c) 6.59 (d) 6.49
  3. 3.3.53 + 9.3 = ? (a) 12.83 (b) 4.46 (c) 12.93 (d) 12.73
  4. 4.What is the value of the digit 1 in 25.167? (a) 0.1 (b) 0.001 (c) 0.01 (d) 1
  5. 5.Which is the smallest: 0.065, 0.514, 0.6, 0.68? (a) 0.065 (b) 0.514 (c) 0.6 (d) 0.68
  6. 6.Which is the smallest: 0.381, 0.4, 0.012, 0.42? (a) 0.381 (b) 0.4 (c) 0.012 (d) 0.42
  7. 7.8.93 + 2.3 = ? (a) 11.23 (b) 11.33 (c) 11.13 (d) 9.16
  8. 8.Which is the smallest: 0.115, 0.26, 0.2, 0.068? (a) 0.115 (b) 0.26 (c) 0.2 (d) 0.068
  9. 9.What is the value of the digit 9 in 81.963? (a) 0.09 (b) 9 (c) 0.009 (d) 0.9
  10. 10.What is the value of the digit 8 in 89.534? (a) 0.08 (b) 80 (c) 0.8 (d) 8
  11. 11.8.44 + 4.4 = ? (a) 12.94 (b) 8.88 (c) 12.74 (d) 12.84
  12. 12.9.57 + 3.2 = ? (a) 9.89 (b) 12.67 (c) 12.77 (d) 12.87
  13. 13.Which is the smallest: 0.193, 0.26, 0.011, 0.2? (a) 0.193 (b) 0.26 (c) 0.011 (d) 0.2
  14. 14.Which is the greatest: 0.789, 0.81, 0.094, 0.8? (a) 0.789 (b) 0.81 (c) 0.094 (d) 0.8
  15. 15.Which is the smallest: 0.311, 0.4, 0.47, 0.081? (a) 0.311 (b) 0.4 (c) 0.47 (d) 0.081
  16. 16.What is the value of the digit 3 in 23.418? (a) 3 (b) 30 (c) 0.03 (d) 0.3
  17. 17.What is the value of the digit 9 in 95.314? (a) 0.9 (b) 9 (c) 90 (d) 0.09
  18. 18.What is the value of the digit 1 in 42.197? (a) 1 (b) 0.01 (c) 0.001 (d) 0.1
  19. 19.3.84 + 9.8 = ? (a) 13.54 (b) 13.64 (c) 13.74 (d) 4.82
  20. 20.What is the value of the digit 5 in 75.849? (a) 50 (b) 0.05 (c) 5 (d) 0.5
  21. 21.What is the value of the digit 8 in 86.159? (a) 8 (b) 0.08 (c) 80 (d) 0.8
  22. 22.What is the value of the digit 3 in 32.549? (a) 0.3 (b) 0.03 (c) 3 (d) 30
  23. 23.Which is the greatest: 0.7, 0.645, 0.74, 0.014? (a) 0.7 (b) 0.645 (c) 0.74 (d) 0.014
  24. 24.6.01 + 4.1 = ? (a) 10.01 (b) 10.21 (c) 10.11 (d) 6.42
  25. 25.Which is the smallest: 0.084, 0.762, 0.8, 0.82? (a) 0.084 (b) 0.762 (c) 0.8 (d) 0.82
  26. 26.4.42 + 5.4 = ? (a) 4.96 (b) 9.92 (c) 9.72 (d) 9.82
  27. 27.2.55 + 3.6 = ? (a) 6.25 (b) 2.91 (c) 6.05 (d) 6.15
  28. 28.9.19 + 3.3 = ? (a) 12.59 (b) 9.52 (c) 12.39 (d) 12.49
  29. 29.8.76 + 7.9 = ? (a) 16.56 (b) 16.66 (c) 16.76 (d) 9.55
  30. 30.1.41 + 3.9 = ? (a) 1.8 (b) 5.31 (c) 5.21 (d) 5.41
  31. 31.What is the value of the digit 7 in 35.867? (a) 0.07 (b) 7 (c) 0.7 (d) 0.007
  32. 32.What is the value of the digit 2 in 23.954? (a) 20 (b) 0.2 (c) 2 (d) 0.02
  33. 33.7.07 + 2.8 = ? (a) 7.35 (b) 9.97 (c) 9.77 (d) 9.87
  34. 34.3.61 + 6.9 = ? (a) 4.3 (b) 10.51 (c) 10.61 (d) 10.41
  35. 35.What is the value of the digit 2 in 41.629? (a) 0.2 (b) 0.002 (c) 0.02 (d) 2
  36. 36.What is the value of the digit 9 in 56.923? (a) 0.09 (b) 9 (c) 0.9 (d) 0.009
  37. 37.Which is the greatest: 0.69, 0.6, 0.022, 0.554? (a) 0.69 (b) 0.6 (c) 0.022 (d) 0.554
  38. 38.7.54 + 7.1 = ? (a) 14.64 (b) 14.74 (c) 14.54 (d) 8.25
  39. 39.2.01 + 3.8 = ? (a) 5.81 (b) 2.39 (c) 5.71 (d) 5.91
  40. 40.4.91 + 8.6 = ? (a) 5.77 (b) 13.61 (c) 13.51 (d) 13.41

Answer key

  1. 11.29
  2. 6.59
  3. 12.83
  4. 0.1
  5. 0.065
  6. 0.012
  7. 11.23
  8. 0.068
  9. 0.9
  10. 80
  11. 12.84
  12. 12.77
  13. 0.011
  14. 0.81
  15. 0.081
  16. 3
  17. 90
  18. 0.1
  19. 13.64
  20. 5
  21. 80
  22. 30
  23. 0.74
  24. 10.11
  25. 0.084
  26. 9.82
  27. 6.15
  28. 12.49
  29. 16.66
  30. 5.31
  31. 0.007
  32. 20
  33. 9.87
  34. 10.51
  35. 0.02
  36. 0.9
  37. 0.69
  38. 14.64
  39. 5.81
  40. 13.51

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