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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 666 · 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. 1.7.67 + 4.3 = ? (a) 8.1 (b) 11.87 (c) 11.97 (d) 12.07
  2. 2.Which is the smallest: 0.296, 0.042, 0.3, 0.32? (a) 0.296 (b) 0.042 (c) 0.3 (d) 0.32
  3. 3.What is the value of the digit 5 in 68.521? (a) 5 (b) 0.005 (c) 0.5 (d) 0.05
  4. 4.What is the value of the digit 4 in 68.249? (a) 0.004 (b) 0.4 (c) 4 (d) 0.04
  5. 5.Which is the greatest: 0.228, 0.056, 0.33, 0.3? (a) 0.228 (b) 0.056 (c) 0.33 (d) 0.3
  6. 6.7.64 + 9.7 = ? (a) 8.61 (b) 17.44 (c) 17.24 (d) 17.34
  7. 7.5.82 + 7.9 = ? (a) 13.82 (b) 13.62 (c) 6.61 (d) 13.72
  8. 8.6.94 + 8.7 = ? (a) 7.81 (b) 15.64 (c) 15.54 (d) 15.74
  9. 9.1.13 + 1.1 = ? (a) 2.33 (b) 2.23 (c) 2.13 (d) 1.24
  10. 10.Which is the smallest: 0.3, 0.081, 0.33, 0.243? (a) 0.3 (b) 0.081 (c) 0.33 (d) 0.243
  11. 11.Which is the smallest: 0.495, 0.59, 0.034, 0.5? (a) 0.495 (b) 0.59 (c) 0.034 (d) 0.5
  12. 12.Which is the smallest: 0.467, 0.022, 0.57, 0.5? (a) 0.467 (b) 0.022 (c) 0.57 (d) 0.5
  13. 13.What is the value of the digit 3 in 31.524? (a) 30 (b) 0.3 (c) 0.03 (d) 3
  14. 14.Which is the smallest: 0.137, 0.27, 0.078, 0.2? (a) 0.137 (b) 0.27 (c) 0.078 (d) 0.2
  15. 15.Which is the smallest: 0.4, 0.076, 0.353, 0.41? (a) 0.4 (b) 0.076 (c) 0.353 (d) 0.41
  16. 16.Which is the greatest: 0.3, 0.077, 0.39, 0.251? (a) 0.3 (b) 0.077 (c) 0.39 (d) 0.251
  17. 17.What is the value of the digit 7 in 42.973? (a) 0.007 (b) 7 (c) 0.7 (d) 0.07
  18. 18.5.71 + 6.6 = ? (a) 12.41 (b) 6.37 (c) 12.31 (d) 12.21
  19. 19.6.43 + 6.2 = ? (a) 7.05 (b) 12.53 (c) 12.73 (d) 12.63
  20. 20.6.86 + 6.6 = ? (a) 7.52 (b) 13.56 (c) 13.36 (d) 13.46
  21. 21.1.31 + 2.7 = ? (a) 1.58 (b) 4.11 (c) 4.01 (d) 3.91
  22. 22.9.12 + 9.7 = ? (a) 10.09 (b) 18.92 (c) 18.72 (d) 18.82
  23. 23.3.23 + 8.1 = ? (a) 11.43 (b) 11.33 (c) 4.04 (d) 11.23
  24. 24.Which is the smallest: 0.7, 0.028, 0.621, 0.72? (a) 0.7 (b) 0.028 (c) 0.621 (d) 0.72
  25. 25.1.11 + 3.2 = ? (a) 4.41 (b) 1.43 (c) 4.21 (d) 4.31
  26. 26.Which is the smallest: 0.5, 0.447, 0.52, 0.069? (a) 0.5 (b) 0.447 (c) 0.52 (d) 0.069
  27. 27.What is the value of the digit 1 in 14.538? (a) 1 (b) 0.1 (c) 10 (d) 0.01
  28. 28.Which is the greatest: 0.83, 0.765, 0.079, 0.8? (a) 0.83 (b) 0.765 (c) 0.079 (d) 0.8
  29. 29.9.85 + 3.7 = ? (a) 13.45 (b) 10.22 (c) 13.65 (d) 13.55
  30. 30.What is the value of the digit 6 in 36.271? (a) 60 (b) 0.6 (c) 0.06 (d) 6
  31. 31.Which is the smallest: 0.054, 0.56, 0.416, 0.5? (a) 0.054 (b) 0.56 (c) 0.416 (d) 0.5
  32. 32.4.13 + 2.7 = ? (a) 4.4 (b) 6.83 (c) 6.73 (d) 6.93
  33. 33.9.45 + 2.4 = ? (a) 11.85 (b) 11.75 (c) 11.95 (d) 9.69
  34. 34.Which is the greatest: 0.458, 0.55, 0.017, 0.5? (a) 0.458 (b) 0.55 (c) 0.017 (d) 0.5
  35. 35.What is the value of the digit 1 in 35.971? (a) 0.1 (b) 0.001 (c) 0.01 (d) 1
  36. 36.What is the value of the digit 9 in 36.819? (a) 0.09 (b) 0.9 (c) 9 (d) 0.009
  37. 37.What is the value of the digit 5 in 45.829? (a) 50 (b) 0.05 (c) 5 (d) 0.5
  38. 38.9.14 + 5.6 = ? (a) 14.84 (b) 14.64 (c) 14.74 (d) 9.7
  39. 39.1.23 + 9.8 = ? (a) 10.93 (b) 2.21 (c) 11.03 (d) 11.13
  40. 40.What is the value of the digit 7 in 27.943? (a) 0.7 (b) 0.07 (c) 70 (d) 7

Answer key

  1. 11.97
  2. 0.042
  3. 0.5
  4. 0.04
  5. 0.33
  6. 17.34
  7. 13.72
  8. 15.64
  9. 2.23
  10. 0.081
  11. 0.034
  12. 0.022
  13. 30
  14. 0.078
  15. 0.076
  16. 0.39
  17. 0.07
  18. 12.31
  19. 12.63
  20. 13.46
  21. 4.01
  22. 18.82
  23. 11.33
  24. 0.028
  25. 4.31
  26. 0.069
  27. 10
  28. 0.83
  29. 13.55
  30. 6
  31. 0.054
  32. 6.83
  33. 11.85
  34. 0.55
  35. 0.001
  36. 0.009
  37. 5
  38. 14.74
  39. 11.03
  40. 7

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