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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 171 · 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. 1.9.43 + 3.9 = ? (a) 13.43 (b) 13.23 (c) 13.33 (d) 9.82
  2. 2.What is the value of the digit 4 in 24.918? (a) 0.04 (b) 0.4 (c) 4 (d) 40
  3. 3.Which is the greatest: 0.415, 0.012, 0.51, 0.5? (a) 0.415 (b) 0.012 (c) 0.51 (d) 0.5
  4. 4.What is the value of the digit 8 in 64.895? (a) 0.008 (b) 8 (c) 0.8 (d) 0.08
  5. 5.Which is the greatest: 0.8, 0.82, 0.095, 0.724? (a) 0.8 (b) 0.82 (c) 0.095 (d) 0.724
  6. 6.6.67 + 1.5 = ? (a) 6.82 (b) 8.07 (c) 8.27 (d) 8.17
  7. 7.1.58 + 7.9 = ? (a) 9.58 (b) 9.48 (c) 2.37 (d) 9.38
  8. 8.9.57 + 4.4 = ? (a) 13.87 (b) 13.97 (c) 14.07 (d) 10.01
  9. 9.7.79 + 3.1 = ? (a) 8.1 (b) 10.99 (c) 10.79 (d) 10.89
  10. 10.Which is the greatest: 0.53, 0.5, 0.092, 0.436? (a) 0.53 (b) 0.5 (c) 0.092 (d) 0.436
  11. 11.7.01 + 3.6 = ? (a) 10.61 (b) 10.51 (c) 7.37 (d) 10.71
  12. 12.What is the value of the digit 6 in 69.527? (a) 60 (b) 0.06 (c) 6 (d) 0.6
  13. 13.3.02 + 2.1 = ? (a) 5.12 (b) 3.23 (c) 5.02 (d) 5.22
  14. 14.Which is the smallest: 0.046, 0.418, 0.54, 0.5? (a) 0.046 (b) 0.418 (c) 0.54 (d) 0.5
  15. 15.2.39 + 7.4 = ? (a) 9.69 (b) 9.89 (c) 9.79 (d) 3.13
  16. 16.What is the value of the digit 3 in 62.358? (a) 0.03 (b) 3 (c) 0.003 (d) 0.3
  17. 17.9.94 + 7.6 = ? (a) 10.7 (b) 17.44 (c) 17.64 (d) 17.54
  18. 18.1.23 + 1.9 = ? (a) 3.13 (b) 3.23 (c) 1.42 (d) 3.03
  19. 19.Which is the greatest: 0.2, 0.22, 0.156, 0.066? (a) 0.2 (b) 0.22 (c) 0.156 (d) 0.066
  20. 20.Which is the greatest: 0.7, 0.617, 0.056, 0.79? (a) 0.7 (b) 0.617 (c) 0.056 (d) 0.79
  21. 21.2.33 + 3.6 = ? (a) 5.93 (b) 2.69 (c) 6.03 (d) 5.83
  22. 22.Which is the smallest: 0.033, 0.142, 0.26, 0.2? (a) 0.033 (b) 0.142 (c) 0.26 (d) 0.2
  23. 23.Which is the smallest: 0.71, 0.612, 0.066, 0.7? (a) 0.71 (b) 0.612 (c) 0.066 (d) 0.7
  24. 24.Which is the smallest: 0.055, 0.79, 0.645, 0.7? (a) 0.055 (b) 0.79 (c) 0.645 (d) 0.7
  25. 25.9.71 + 6.2 = ? (a) 15.81 (b) 10.33 (c) 15.91 (d) 16.01
  26. 26.What is the value of the digit 8 in 28.431? (a) 0.08 (b) 0.8 (c) 8 (d) 80
  27. 27.Which is the greatest: 0.5, 0.449, 0.013, 0.59? (a) 0.5 (b) 0.449 (c) 0.013 (d) 0.59
  28. 28.Which is the greatest: 0.024, 0.63, 0.522, 0.6? (a) 0.024 (b) 0.63 (c) 0.522 (d) 0.6
  29. 29.Which is the greatest: 0.22, 0.091, 0.161, 0.2? (a) 0.22 (b) 0.091 (c) 0.161 (d) 0.2
  30. 30.1.77 + 8.3 = ? (a) 9.97 (b) 10.07 (c) 2.6 (d) 10.17
  31. 31.Which is the greatest: 0.74, 0.027, 0.628, 0.7? (a) 0.74 (b) 0.027 (c) 0.628 (d) 0.7
  32. 32.Which is the smallest: 0.021, 0.41, 0.387, 0.4? (a) 0.021 (b) 0.41 (c) 0.387 (d) 0.4
  33. 33.5.01 + 3.2 = ? (a) 8.31 (b) 8.21 (c) 5.33 (d) 8.11
  34. 34.8.71 + 9.5 = ? (a) 18.21 (b) 18.31 (c) 9.66 (d) 18.11
  35. 35.8.52 + 1.3 = ? (a) 9.72 (b) 9.92 (c) 9.82 (d) 8.65
  36. 36.Which is the smallest: 0.225, 0.3, 0.023, 0.35? (a) 0.225 (b) 0.3 (c) 0.023 (d) 0.35
  37. 37.What is the value of the digit 6 in 63.492? (a) 6 (b) 60 (c) 0.06 (d) 0.6
  38. 38.What is the value of the digit 3 in 65.319? (a) 0.03 (b) 0.003 (c) 3 (d) 0.3
  39. 39.Which is the greatest: 0.533, 0.012, 0.65, 0.6? (a) 0.533 (b) 0.012 (c) 0.65 (d) 0.6
  40. 40.2.83 + 9.5 = ? (a) 12.33 (b) 12.43 (c) 3.78 (d) 12.23

Answer key

  1. 13.33
  2. 4
  3. 0.51
  4. 0.8
  5. 0.82
  6. 8.17
  7. 9.48
  8. 13.97
  9. 10.89
  10. 0.53
  11. 10.61
  12. 60
  13. 5.12
  14. 0.046
  15. 9.79
  16. 0.3
  17. 17.54
  18. 3.13
  19. 0.22
  20. 0.79
  21. 5.93
  22. 0.033
  23. 0.066
  24. 0.055
  25. 15.91
  26. 8
  27. 0.59
  28. 0.63
  29. 0.22
  30. 10.07
  31. 0.74
  32. 0.021
  33. 8.21
  34. 18.21
  35. 9.82
  36. 0.023
  37. 60
  38. 0.3
  39. 0.65
  40. 12.33

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