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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 661 · 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. 1.8.09 + 5.4 = ? (a) 13.49 (b) 13.59 (c) 8.63 (d) 13.39
  2. 2.Which is the greatest: 0.029, 0.172, 0.2, 0.25? (a) 0.029 (b) 0.172 (c) 0.2 (d) 0.25
  3. 3.Which is the smallest: 0.57, 0.025, 0.5, 0.433? (a) 0.57 (b) 0.025 (c) 0.5 (d) 0.433
  4. 4.Which is the smallest: 0.57, 0.065, 0.5, 0.462? (a) 0.57 (b) 0.065 (c) 0.5 (d) 0.462
  5. 5.What is the value of the digit 6 in 61.487? (a) 60 (b) 0.06 (c) 0.6 (d) 6
  6. 6.5.93 + 2.5 = ? (a) 8.33 (b) 6.18 (c) 8.43 (d) 8.53
  7. 7.9.26 + 6.5 = ? (a) 15.76 (b) 15.86 (c) 9.91 (d) 15.66
  8. 8.3.32 + 3.8 = ? (a) 3.7 (b) 7.02 (c) 7.12 (d) 7.22
  9. 9.What is the value of the digit 3 in 45.163? (a) 0.03 (b) 3 (c) 0.003 (d) 0.3
  10. 10.Which is the smallest: 0.016, 0.454, 0.53, 0.5? (a) 0.016 (b) 0.454 (c) 0.53 (d) 0.5
  11. 11.Which is the greatest: 0.133, 0.067, 0.21, 0.2? (a) 0.133 (b) 0.067 (c) 0.21 (d) 0.2
  12. 12.1.12 + 4.8 = ? (a) 1.6 (b) 5.82 (c) 6.02 (d) 5.92
  13. 13.7.37 + 8.6 = ? (a) 15.97 (b) 16.07 (c) 15.87 (d) 8.23
  14. 14.What is the value of the digit 8 in 65.893? (a) 8 (b) 0.008 (c) 0.08 (d) 0.8
  15. 15.5.41 + 4.8 = ? (a) 10.31 (b) 5.89 (c) 10.21 (d) 10.11
  16. 16.Which is the smallest: 0.55, 0.022, 0.5, 0.458? (a) 0.55 (b) 0.022 (c) 0.5 (d) 0.458
  17. 17.Which is the smallest: 0.249, 0.31, 0.3, 0.039? (a) 0.249 (b) 0.31 (c) 0.3 (d) 0.039
  18. 18.Which is the greatest: 0.075, 0.73, 0.7, 0.622? (a) 0.075 (b) 0.73 (c) 0.7 (d) 0.622
  19. 19.What is the value of the digit 1 in 29.731? (a) 1 (b) 0.001 (c) 0.01 (d) 0.1
  20. 20.Which is the greatest: 0.566, 0.6, 0.099, 0.68? (a) 0.566 (b) 0.6 (c) 0.099 (d) 0.68
  21. 21.Which is the smallest: 0.67, 0.023, 0.516, 0.6? (a) 0.67 (b) 0.023 (c) 0.516 (d) 0.6
  22. 22.What is the value of the digit 9 in 18.924? (a) 0.09 (b) 0.9 (c) 0.009 (d) 9
  23. 23.5.83 + 6.9 = ? (a) 12.73 (b) 12.63 (c) 6.52 (d) 12.83
  24. 24.Which is the smallest: 0.027, 0.312, 0.46, 0.4? (a) 0.027 (b) 0.312 (c) 0.46 (d) 0.4
  25. 25.What is the value of the digit 4 in 49.718? (a) 0.4 (b) 4 (c) 0.04 (d) 40
  26. 26.1.08 + 7.4 = ? (a) 8.58 (b) 8.38 (c) 1.82 (d) 8.48
  27. 27.7.22 + 8.9 = ? (a) 8.11 (b) 16.22 (c) 16.02 (d) 16.12
  28. 28.Which is the greatest: 0.7, 0.612, 0.76, 0.082? (a) 0.7 (b) 0.612 (c) 0.76 (d) 0.082
  29. 29.6.24 + 6.9 = ? (a) 13.04 (b) 6.93 (c) 13.14 (d) 13.24
  30. 30.What is the value of the digit 3 in 87.653? (a) 0.3 (b) 0.03 (c) 3 (d) 0.003
  31. 31.7.57 + 2.2 = ? (a) 9.77 (b) 9.87 (c) 9.67 (d) 7.79
  32. 32.Which is the greatest: 0.675, 0.72, 0.025, 0.7? (a) 0.675 (b) 0.72 (c) 0.025 (d) 0.7
  33. 33.9.14 + 9.7 = ? (a) 18.94 (b) 18.74 (c) 10.11 (d) 18.84
  34. 34.1.61 + 5.7 = ? (a) 7.31 (b) 2.18 (c) 7.41 (d) 7.21
  35. 35.What is the value of the digit 7 in 68.793? (a) 0.007 (b) 0.7 (c) 7 (d) 0.07
  36. 36.1.64 + 2.8 = ? (a) 1.92 (b) 4.34 (c) 4.54 (d) 4.44
  37. 37.Which is the smallest: 0.87, 0.751, 0.077, 0.8? (a) 0.87 (b) 0.751 (c) 0.077 (d) 0.8
  38. 38.3.23 + 2.7 = ? (a) 3.5 (b) 5.83 (c) 5.93 (d) 6.03
  39. 39.Which is the greatest: 0.538, 0.64, 0.068, 0.6? (a) 0.538 (b) 0.64 (c) 0.068 (d) 0.6
  40. 40.What is the value of the digit 7 in 97.816? (a) 7 (b) 70 (c) 0.7 (d) 0.07

Answer key

  1. 13.49
  2. 0.25
  3. 0.025
  4. 0.065
  5. 60
  6. 8.43
  7. 15.76
  8. 7.12
  9. 0.003
  10. 0.016
  11. 0.21
  12. 5.92
  13. 15.97
  14. 0.8
  15. 10.21
  16. 0.022
  17. 0.039
  18. 0.73
  19. 0.001
  20. 0.68
  21. 0.023
  22. 0.9
  23. 12.73
  24. 0.027
  25. 40
  26. 8.48
  27. 16.12
  28. 0.76
  29. 13.14
  30. 0.003
  31. 9.77
  32. 0.72
  33. 18.84
  34. 7.31
  35. 0.7
  36. 4.44
  37. 0.077
  38. 5.93
  39. 0.64
  40. 7

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