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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 808 · 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. 1.8.36 + 5.6 = ? (a) 14.06 (b) 13.96 (c) 8.92 (d) 13.86
  2. 2.Which is the greatest: 0.599, 0.086, 0.61, 0.6? (a) 0.599 (b) 0.086 (c) 0.61 (d) 0.6
  3. 3.Which is the smallest: 0.452, 0.025, 0.52, 0.5? (a) 0.452 (b) 0.025 (c) 0.52 (d) 0.5
  4. 4.What is the value of the digit 5 in 78.235? (a) 0.05 (b) 0.005 (c) 0.5 (d) 5
  5. 5.What is the value of the digit 3 in 35.478? (a) 0.03 (b) 3 (c) 0.3 (d) 30
  6. 6.7.81 + 1.2 = ? (a) 7.93 (b) 9.11 (c) 8.91 (d) 9.01
  7. 7.1.49 + 1.7 = ? (a) 1.66 (b) 3.09 (c) 3.19 (d) 3.29
  8. 8.5.99 + 9.2 = ? (a) 15.09 (b) 6.91 (c) 15.19 (d) 15.29
  9. 9.2.94 + 8.3 = ? (a) 11.14 (b) 11.24 (c) 11.34 (d) 3.77
  10. 10.7.31 + 6.5 = ? (a) 13.71 (b) 7.96 (c) 13.81 (d) 13.91
  11. 11.What is the value of the digit 2 in 38.129? (a) 0.2 (b) 0.002 (c) 2 (d) 0.02
  12. 12.What is the value of the digit 3 in 54.673? (a) 0.03 (b) 3 (c) 0.003 (d) 0.3
  13. 13.4.06 + 3.5 = ? (a) 7.46 (b) 4.41 (c) 7.56 (d) 7.66
  14. 14.1.82 + 8.3 = ? (a) 10.02 (b) 2.65 (c) 10.22 (d) 10.12
  15. 15.Which is the greatest: 0.368, 0.4, 0.42, 0.095? (a) 0.368 (b) 0.4 (c) 0.42 (d) 0.095
  16. 16.Which is the smallest: 0.78, 0.7, 0.635, 0.028? (a) 0.78 (b) 0.7 (c) 0.635 (d) 0.028
  17. 17.Which is the greatest: 0.019, 0.8, 0.753, 0.84? (a) 0.019 (b) 0.8 (c) 0.753 (d) 0.84
  18. 18.8.03 + 1.1 = ? (a) 9.13 (b) 8.14 (c) 9.23 (d) 9.03
  19. 19.Which is the greatest: 0.115, 0.094, 0.2, 0.27? (a) 0.115 (b) 0.094 (c) 0.2 (d) 0.27
  20. 20.9.18 + 3.6 = ? (a) 9.54 (b) 12.78 (c) 12.88 (d) 12.68
  21. 21.Which is the greatest: 0.272, 0.079, 0.39, 0.3? (a) 0.272 (b) 0.079 (c) 0.39 (d) 0.3
  22. 22.What is the value of the digit 9 in 28.439? (a) 9 (b) 0.9 (c) 0.09 (d) 0.009
  23. 23.What is the value of the digit 4 in 12.475? (a) 0.004 (b) 0.4 (c) 4 (d) 0.04
  24. 24.What is the value of the digit 6 in 36.452? (a) 6 (b) 0.6 (c) 0.06 (d) 60
  25. 25.2.48 + 3.1 = ? (a) 5.58 (b) 5.48 (c) 2.79 (d) 5.68
  26. 26.Which is the smallest: 0.489, 0.5, 0.078, 0.52? (a) 0.489 (b) 0.5 (c) 0.078 (d) 0.52
  27. 27.6.83 + 5.1 = ? (a) 11.83 (b) 7.34 (c) 11.93 (d) 12.03
  28. 28.What is the value of the digit 1 in 49.175? (a) 0.1 (b) 0.01 (c) 1 (d) 0.001
  29. 29.Which is the smallest: 0.21, 0.128, 0.2, 0.013? (a) 0.21 (b) 0.128 (c) 0.2 (d) 0.013
  30. 30.1.53 + 5.4 = ? (a) 7.03 (b) 6.93 (c) 6.83 (d) 2.07
  31. 31.Which is the greatest: 0.311, 0.46, 0.092, 0.4? (a) 0.311 (b) 0.46 (c) 0.092 (d) 0.4
  32. 32.What is the value of the digit 7 in 31.789? (a) 7 (b) 0.7 (c) 0.007 (d) 0.07
  33. 33.What is the value of the digit 5 in 48.359? (a) 0.5 (b) 0.05 (c) 5 (d) 0.005
  34. 34.Which is the smallest: 0.47, 0.4, 0.329, 0.083? (a) 0.47 (b) 0.4 (c) 0.329 (d) 0.083
  35. 35.Which is the greatest: 0.568, 0.6, 0.67, 0.088? (a) 0.568 (b) 0.6 (c) 0.67 (d) 0.088
  36. 36.What is the value of the digit 8 in 13.829? (a) 8 (b) 0.8 (c) 0.08 (d) 0.008
  37. 37.4.33 + 5.6 = ? (a) 10.03 (b) 9.93 (c) 4.89 (d) 9.83
  38. 38.6.43 + 5.1 = ? (a) 6.94 (b) 11.63 (c) 11.53 (d) 11.43
  39. 39.Which is the smallest: 0.3, 0.271, 0.042, 0.32? (a) 0.3 (b) 0.271 (c) 0.042 (d) 0.32
  40. 40.5.94 + 4.8 = ? (a) 6.42 (b) 10.64 (c) 10.74 (d) 10.84

Answer key

  1. 13.96
  2. 0.61
  3. 0.025
  4. 0.005
  5. 30
  6. 9.01
  7. 3.19
  8. 15.19
  9. 11.24
  10. 13.81
  11. 0.02
  12. 0.003
  13. 7.56
  14. 10.12
  15. 0.42
  16. 0.028
  17. 0.84
  18. 9.13
  19. 0.27
  20. 12.78
  21. 0.39
  22. 0.009
  23. 0.4
  24. 6
  25. 5.58
  26. 0.078
  27. 11.93
  28. 0.1
  29. 0.013
  30. 6.93
  31. 0.46
  32. 0.7
  33. 0.05
  34. 0.083
  35. 0.67
  36. 0.8
  37. 9.93
  38. 11.53
  39. 0.042
  40. 10.74

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