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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 54 · 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.What is the value of the digit 1 in 27.431? (a) 1 (b) 0.01 (c) 0.001 (d) 0.1
  2. 2.6.91 + 8.3 = ? (a) 15.21 (b) 15.11 (c) 15.31 (d) 7.74
  3. 3.What is the value of the digit 5 in 94.576? (a) 0.005 (b) 5 (c) 0.05 (d) 0.5
  4. 4.4.98 + 2.6 = ? (a) 5.24 (b) 7.68 (c) 7.58 (d) 7.48
  5. 5.What is the value of the digit 1 in 12.548? (a) 1 (b) 10 (c) 0.01 (d) 0.1
  6. 6.2.28 + 3.1 = ? (a) 5.48 (b) 2.59 (c) 5.28 (d) 5.38
  7. 7.7.58 + 9.5 = ? (a) 17.18 (b) 8.53 (c) 16.98 (d) 17.08
  8. 8.Which is the smallest: 0.045, 0.512, 0.6, 0.69? (a) 0.045 (b) 0.512 (c) 0.6 (d) 0.69
  9. 9.4.42 + 3.8 = ? (a) 4.8 (b) 8.22 (c) 8.12 (d) 8.32
  10. 10.5.46 + 5.7 = ? (a) 11.16 (b) 6.03 (c) 11.06 (d) 11.26
  11. 11.Which is the smallest: 0.482, 0.5, 0.077, 0.59? (a) 0.482 (b) 0.5 (c) 0.077 (d) 0.59
  12. 12.5.05 + 3.5 = ? (a) 8.65 (b) 8.55 (c) 8.45 (d) 5.4
  13. 13.1.24 + 6.2 = ? (a) 7.34 (b) 1.86 (c) 7.44 (d) 7.54
  14. 14.What is the value of the digit 3 in 39.145? (a) 0.3 (b) 0.03 (c) 3 (d) 30
  15. 15.Which is the greatest: 0.49, 0.4, 0.312, 0.061? (a) 0.49 (b) 0.4 (c) 0.312 (d) 0.061
  16. 16.5.89 + 9.2 = ? (a) 15.09 (b) 15.19 (c) 14.99 (d) 6.81
  17. 17.What is the value of the digit 4 in 14.629? (a) 0.4 (b) 0.04 (c) 40 (d) 4
  18. 18.What is the value of the digit 4 in 38.945? (a) 0.4 (b) 0.004 (c) 4 (d) 0.04
  19. 19.Which is the smallest: 0.7, 0.76, 0.624, 0.013? (a) 0.7 (b) 0.76 (c) 0.624 (d) 0.013
  20. 20.Which is the greatest: 0.48, 0.4, 0.319, 0.029? (a) 0.48 (b) 0.4 (c) 0.319 (d) 0.029
  21. 21.What is the value of the digit 3 in 65.349? (a) 3 (b) 0.003 (c) 0.3 (d) 0.03
  22. 22.1.09 + 5.1 = ? (a) 6.09 (b) 1.6 (c) 6.29 (d) 6.19
  23. 23.2.88 + 9.1 = ? (a) 12.08 (b) 3.79 (c) 11.88 (d) 11.98
  24. 24.What is the value of the digit 7 in 29.173? (a) 0.007 (b) 0.07 (c) 0.7 (d) 7
  25. 25.Which is the smallest: 0.74, 0.053, 0.7, 0.677? (a) 0.74 (b) 0.053 (c) 0.7 (d) 0.677
  26. 26.5.71 + 7.5 = ? (a) 6.46 (b) 13.21 (c) 13.31 (d) 13.11
  27. 27.Which is the greatest: 0.323, 0.41, 0.4, 0.048? (a) 0.323 (b) 0.41 (c) 0.4 (d) 0.048
  28. 28.8.52 + 2.1 = ? (a) 8.73 (b) 10.62 (c) 10.72 (d) 10.52
  29. 29.What is the value of the digit 5 in 49.528? (a) 0.5 (b) 5 (c) 0.005 (d) 0.05
  30. 30.What is the value of the digit 9 in 95.162? (a) 0.9 (b) 0.09 (c) 9 (d) 90
  31. 31.Which is the greatest: 0.262, 0.016, 0.3, 0.33? (a) 0.262 (b) 0.016 (c) 0.3 (d) 0.33
  32. 32.3.31 + 1.5 = ? (a) 4.91 (b) 3.46 (c) 4.71 (d) 4.81
  33. 33.Which is the greatest: 0.6, 0.094, 0.581, 0.66? (a) 0.6 (b) 0.094 (c) 0.581 (d) 0.66
  34. 34.Which is the smallest: 0.2, 0.046, 0.28, 0.115? (a) 0.2 (b) 0.046 (c) 0.28 (d) 0.115
  35. 35.6.07 + 3.5 = ? (a) 9.47 (b) 6.42 (c) 9.67 (d) 9.57
  36. 36.Which is the greatest: 0.691, 0.034, 0.7, 0.73? (a) 0.691 (b) 0.034 (c) 0.7 (d) 0.73
  37. 37.What is the value of the digit 8 in 81.257? (a) 0.8 (b) 8 (c) 0.08 (d) 80
  38. 38.What is the value of the digit 5 in 56.382? (a) 0.5 (b) 5 (c) 50 (d) 0.05
  39. 39.What is the value of the digit 6 in 17.642? (a) 0.6 (b) 0.06 (c) 0.006 (d) 6
  40. 40.What is the value of the digit 5 in 12.735? (a) 0.005 (b) 5 (c) 0.05 (d) 0.5

Answer key

  1. 0.001
  2. 15.21
  3. 0.5
  4. 7.58
  5. 10
  6. 5.38
  7. 17.08
  8. 0.045
  9. 8.22
  10. 11.16
  11. 0.077
  12. 8.55
  13. 7.44
  14. 30
  15. 0.49
  16. 15.09
  17. 4
  18. 0.04
  19. 0.013
  20. 0.48
  21. 0.3
  22. 6.19
  23. 11.98
  24. 0.07
  25. 0.053
  26. 13.21
  27. 0.41
  28. 10.62
  29. 0.5
  30. 90
  31. 0.33
  32. 4.81
  33. 0.66
  34. 0.046
  35. 9.57
  36. 0.73
  37. 80
  38. 50
  39. 0.6
  40. 0.005

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