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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 451 · 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.Which is the greatest: 0.63, 0.027, 0.6, 0.577? (a) 0.63 (b) 0.027 (c) 0.6 (d) 0.577
  2. 2.2.93 + 4.7 = ? (a) 7.53 (b) 7.63 (c) 3.4 (d) 7.73
  3. 3.7.92 + 2.2 = ? (a) 10.12 (b) 10.22 (c) 10.02 (d) 8.14
  4. 4.What is the value of the digit 3 in 82.431? (a) 0.003 (b) 3 (c) 0.03 (d) 0.3
  5. 5.Which is the greatest: 0.49, 0.059, 0.4, 0.389? (a) 0.49 (b) 0.059 (c) 0.4 (d) 0.389
  6. 6.3.81 + 2.6 = ? (a) 6.51 (b) 6.31 (c) 4.07 (d) 6.41
  7. 7.Which is the greatest: 0.8, 0.789, 0.067, 0.89? (a) 0.8 (b) 0.789 (c) 0.067 (d) 0.89
  8. 8.3.03 + 8.8 = ? (a) 11.93 (b) 3.91 (c) 11.83 (d) 11.73
  9. 9.Which is the greatest: 0.37, 0.072, 0.279, 0.3? (a) 0.37 (b) 0.072 (c) 0.279 (d) 0.3
  10. 10.Which is the greatest: 0.076, 0.3, 0.35, 0.299? (a) 0.076 (b) 0.3 (c) 0.35 (d) 0.299
  11. 11.2.17 + 4.7 = ? (a) 2.64 (b) 6.97 (c) 6.77 (d) 6.87
  12. 12.Which is the greatest: 0.28, 0.186, 0.2, 0.089? (a) 0.28 (b) 0.186 (c) 0.2 (d) 0.089
  13. 13.6.51 + 1.6 = ? (a) 8.21 (b) 8.11 (c) 8.01 (d) 6.67
  14. 14.Which is the smallest: 0.793, 0.8, 0.85, 0.063? (a) 0.793 (b) 0.8 (c) 0.85 (d) 0.063
  15. 15.What is the value of the digit 5 in 52.394? (a) 50 (b) 0.05 (c) 5 (d) 0.5
  16. 16.5.36 + 2.1 = ? (a) 7.56 (b) 7.46 (c) 7.36 (d) 5.57
  17. 17.Which is the greatest: 0.027, 0.48, 0.388, 0.4? (a) 0.027 (b) 0.48 (c) 0.388 (d) 0.4
  18. 18.Which is the smallest: 0.497, 0.055, 0.53, 0.5? (a) 0.497 (b) 0.055 (c) 0.53 (d) 0.5
  19. 19.Which is the greatest: 0.3, 0.258, 0.31, 0.038? (a) 0.3 (b) 0.258 (c) 0.31 (d) 0.038
  20. 20.What is the value of the digit 3 in 18.593? (a) 0.03 (b) 3 (c) 0.003 (d) 0.3
  21. 21.5.27 + 5.1 = ? (a) 10.47 (b) 5.78 (c) 10.27 (d) 10.37
  22. 22.5.24 + 9.6 = ? (a) 14.74 (b) 14.84 (c) 14.94 (d) 6.2
  23. 23.3.76 + 7.4 = ? (a) 4.5 (b) 11.16 (c) 11.26 (d) 11.06
  24. 24.2.01 + 3.7 = ? (a) 5.61 (b) 2.38 (c) 5.71 (d) 5.81
  25. 25.1.75 + 9.9 = ? (a) 11.65 (b) 11.55 (c) 11.75 (d) 2.74
  26. 26.2.84 + 4.5 = ? (a) 7.44 (b) 7.24 (c) 3.29 (d) 7.34
  27. 27.2.33 + 3.4 = ? (a) 2.67 (b) 5.83 (c) 5.73 (d) 5.63
  28. 28.Which is the greatest: 0.7, 0.79, 0.011, 0.633? (a) 0.7 (b) 0.79 (c) 0.011 (d) 0.633
  29. 29.9.95 + 2.7 = ? (a) 12.65 (b) 10.22 (c) 12.75 (d) 12.55
  30. 30.Which is the smallest: 0.5, 0.428, 0.065, 0.52? (a) 0.5 (b) 0.428 (c) 0.065 (d) 0.52
  31. 31.Which is the smallest: 0.27, 0.061, 0.2, 0.162? (a) 0.27 (b) 0.061 (c) 0.2 (d) 0.162
  32. 32.1.06 + 2.5 = ? (a) 1.31 (b) 3.46 (c) 3.66 (d) 3.56
  33. 33.2.38 + 1.7 = ? (a) 2.55 (b) 3.98 (c) 4.08 (d) 4.18
  34. 34.Which is the greatest: 0.591, 0.6, 0.088, 0.62? (a) 0.591 (b) 0.6 (c) 0.088 (d) 0.62
  35. 35.4.16 + 5.1 = ? (a) 9.16 (b) 9.36 (c) 4.67 (d) 9.26
  36. 36.3.51 + 7.9 = ? (a) 11.31 (b) 4.3 (c) 11.51 (d) 11.41
  37. 37.8.67 + 3.1 = ? (a) 11.67 (b) 11.77 (c) 8.98 (d) 11.87
  38. 38.1.12 + 2.7 = ? (a) 3.72 (b) 3.82 (c) 1.39 (d) 3.92
  39. 39.8.19 + 1.1 = ? (a) 9.19 (b) 9.29 (c) 9.39 (d) 8.3
  40. 40.What is the value of the digit 4 in 94.582? (a) 40 (b) 0.4 (c) 0.04 (d) 4

Answer key

  1. 0.63
  2. 7.63
  3. 10.12
  4. 0.03
  5. 0.49
  6. 6.41
  7. 0.89
  8. 11.83
  9. 0.37
  10. 0.35
  11. 6.87
  12. 0.28
  13. 8.11
  14. 0.063
  15. 50
  16. 7.46
  17. 0.48
  18. 0.055
  19. 0.31
  20. 0.003
  21. 10.37
  22. 14.84
  23. 11.16
  24. 5.71
  25. 11.65
  26. 7.34
  27. 5.73
  28. 0.79
  29. 12.65
  30. 0.065
  31. 0.061
  32. 3.56
  33. 4.08
  34. 0.62
  35. 9.26
  36. 11.41
  37. 11.77
  38. 3.82
  39. 9.29
  40. 4

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