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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 720 · 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. 1.6.51 + 5.3 = ? (a) 11.91 (b) 11.81 (c) 7.04 (d) 11.71
  2. 2.Which is the greatest: 0.78, 0.7, 0.629, 0.063? (a) 0.78 (b) 0.7 (c) 0.629 (d) 0.063
  3. 3.What is the value of the digit 3 in 91.348? (a) 0.003 (b) 0.3 (c) 3 (d) 0.03
  4. 4.Which is the greatest: 0.214, 0.3, 0.021, 0.38? (a) 0.214 (b) 0.3 (c) 0.021 (d) 0.38
  5. 5.What is the value of the digit 1 in 15.397? (a) 1 (b) 10 (c) 0.01 (d) 0.1
  6. 6.What is the value of the digit 7 in 41.279? (a) 7 (b) 0.07 (c) 0.007 (d) 0.7
  7. 7.9.01 + 1.8 = ? (a) 10.91 (b) 10.81 (c) 9.19 (d) 10.71
  8. 8.8.55 + 5.8 = ? (a) 14.35 (b) 14.25 (c) 14.45 (d) 9.13
  9. 9.9.61 + 7.3 = ? (a) 17.01 (b) 16.81 (c) 10.34 (d) 16.91
  10. 10.What is the value of the digit 4 in 75.241? (a) 0.4 (b) 4 (c) 0.04 (d) 0.004
  11. 11.What is the value of the digit 5 in 59.821? (a) 5 (b) 50 (c) 0.05 (d) 0.5
  12. 12.8.92 + 1.5 = ? (a) 10.52 (b) 10.32 (c) 9.07 (d) 10.42
  13. 13.What is the value of the digit 4 in 74.632? (a) 40 (b) 4 (c) 0.4 (d) 0.04
  14. 14.Which is the greatest: 0.75, 0.052, 0.7, 0.656? (a) 0.75 (b) 0.052 (c) 0.7 (d) 0.656
  15. 15.9.51 + 9.3 = ? (a) 18.91 (b) 18.81 (c) 18.71 (d) 10.44
  16. 16.1.82 + 7.4 = ? (a) 9.32 (b) 9.12 (c) 9.22 (d) 2.56
  17. 17.Which is the smallest: 0.59, 0.5, 0.051, 0.477? (a) 0.59 (b) 0.5 (c) 0.051 (d) 0.477
  18. 18.What is the value of the digit 5 in 23.574? (a) 0.005 (b) 5 (c) 0.05 (d) 0.5
  19. 19.1.51 + 1.5 = ? (a) 3.01 (b) 3.11 (c) 2.91 (d) 1.66
  20. 20.Which is the smallest: 0.085, 0.171, 0.2, 0.28? (a) 0.085 (b) 0.171 (c) 0.2 (d) 0.28
  21. 21.2.79 + 5.1 = ? (a) 7.99 (b) 3.3 (c) 7.79 (d) 7.89
  22. 22.Which is the smallest: 0.23, 0.169, 0.2, 0.071? (a) 0.23 (b) 0.169 (c) 0.2 (d) 0.071
  23. 23.Which is the greatest: 0.483, 0.076, 0.58, 0.5? (a) 0.483 (b) 0.076 (c) 0.58 (d) 0.5
  24. 24.5.37 + 9.6 = ? (a) 15.07 (b) 6.33 (c) 14.97 (d) 14.87
  25. 25.7.51 + 5.1 = ? (a) 12.51 (b) 12.61 (c) 12.71 (d) 8.02
  26. 26.5.24 + 8.1 = ? (a) 13.34 (b) 6.05 (c) 13.24 (d) 13.44
  27. 27.7.32 + 5.9 = ? (a) 13.22 (b) 13.12 (c) 7.91 (d) 13.32
  28. 28.What is the value of the digit 9 in 71.539? (a) 0.09 (b) 9 (c) 0.009 (d) 0.9
  29. 29.Which is the smallest: 0.3, 0.097, 0.266, 0.34? (a) 0.3 (b) 0.097 (c) 0.266 (d) 0.34
  30. 30.5.65 + 9.3 = ? (a) 6.58 (b) 14.85 (c) 15.05 (d) 14.95
  31. 31.What is the value of the digit 6 in 43.619? (a) 0.006 (b) 0.6 (c) 0.06 (d) 6
  32. 32.Which is the greatest: 0.6, 0.058, 0.62, 0.594? (a) 0.6 (b) 0.058 (c) 0.62 (d) 0.594
  33. 33.What is the value of the digit 4 in 54.967? (a) 4 (b) 0.4 (c) 40 (d) 0.04
  34. 34.What is the value of the digit 7 in 49.357? (a) 0.7 (b) 0.07 (c) 7 (d) 0.007
  35. 35.7.67 + 2.6 = ? (a) 10.37 (b) 7.93 (c) 10.27 (d) 10.17
  36. 36.9.21 + 7.6 = ? (a) 16.91 (b) 16.81 (c) 9.97 (d) 16.71
  37. 37.What is the value of the digit 1 in 84.136? (a) 0.01 (b) 1 (c) 0.001 (d) 0.1
  38. 38.What is the value of the digit 2 in 38.527? (a) 0.02 (b) 0.2 (c) 0.002 (d) 2
  39. 39.Which is the greatest: 0.022, 0.139, 0.2, 0.27? (a) 0.022 (b) 0.139 (c) 0.2 (d) 0.27
  40. 40.Which is the greatest: 0.095, 0.39, 0.3, 0.222? (a) 0.095 (b) 0.39 (c) 0.3 (d) 0.222

Answer key

  1. 11.81
  2. 0.78
  3. 0.3
  4. 0.38
  5. 10
  6. 0.07
  7. 10.81
  8. 14.35
  9. 16.91
  10. 0.04
  11. 50
  12. 10.42
  13. 4
  14. 0.75
  15. 18.81
  16. 9.22
  17. 0.051
  18. 0.5
  19. 3.01
  20. 0.085
  21. 7.89
  22. 0.071
  23. 0.58
  24. 14.97
  25. 12.61
  26. 13.34
  27. 13.22
  28. 0.009
  29. 0.097
  30. 14.95
  31. 0.6
  32. 0.62
  33. 4
  34. 0.007
  35. 10.27
  36. 16.81
  37. 0.1
  38. 0.02
  39. 0.27
  40. 0.39

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