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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 311 · 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. 1.9.83 + 4.1 = ? (a) 10.24 (b) 13.83 (c) 14.03 (d) 13.93
  2. 2.What is the value of the digit 2 in 24.675? (a) 0.2 (b) 2 (c) 20 (d) 0.02
  3. 3.2.47 + 2.9 = ? (a) 5.47 (b) 2.76 (c) 5.27 (d) 5.37
  4. 4.Which is the greatest: 0.5, 0.092, 0.438, 0.53? (a) 0.5 (b) 0.092 (c) 0.438 (d) 0.53
  5. 5.What is the value of the digit 4 in 73.452? (a) 4 (b) 0.04 (c) 0.004 (d) 0.4
  6. 6.7.18 + 7.8 = ? (a) 15.08 (b) 14.98 (c) 7.96 (d) 14.88
  7. 7.5.82 + 4.2 = ? (a) 10.12 (b) 9.92 (c) 6.24 (d) 10.02
  8. 8.3.71 + 8.1 = ? (a) 11.71 (b) 11.81 (c) 11.91 (d) 4.52
  9. 9.Which is the smallest: 0.774, 0.032, 0.83, 0.8? (a) 0.774 (b) 0.032 (c) 0.83 (d) 0.8
  10. 10.9.76 + 7.4 = ? (a) 10.5 (b) 17.16 (c) 17.06 (d) 17.26
  11. 11.Which is the smallest: 0.53, 0.088, 0.5, 0.431? (a) 0.53 (b) 0.088 (c) 0.5 (d) 0.431
  12. 12.6.39 + 6.6 = ? (a) 7.05 (b) 12.99 (c) 12.89 (d) 13.09
  13. 13.What is the value of the digit 1 in 31.725? (a) 0.1 (b) 10 (c) 1 (d) 0.01
  14. 14.Which is the greatest: 0.181, 0.073, 0.27, 0.2? (a) 0.181 (b) 0.073 (c) 0.27 (d) 0.2
  15. 15.What is the value of the digit 1 in 21.853? (a) 10 (b) 0.01 (c) 0.1 (d) 1
  16. 16.6.01 + 9.2 = ? (a) 6.93 (b) 15.21 (c) 15.11 (d) 15.31
  17. 17.7.56 + 4.7 = ? (a) 12.36 (b) 8.03 (c) 12.16 (d) 12.26
  18. 18.5.56 + 2.5 = ? (a) 5.81 (b) 8.06 (c) 8.16 (d) 7.96
  19. 19.Which is the smallest: 0.3, 0.223, 0.31, 0.011? (a) 0.3 (b) 0.223 (c) 0.31 (d) 0.011
  20. 20.What is the value of the digit 3 in 97.132? (a) 0.003 (b) 0.03 (c) 3 (d) 0.3
  21. 21.Which is the smallest: 0.51, 0.5, 0.061, 0.436? (a) 0.51 (b) 0.5 (c) 0.061 (d) 0.436
  22. 22.2.27 + 5.9 = ? (a) 8.17 (b) 2.86 (c) 8.27 (d) 8.07
  23. 23.Which is the smallest: 0.091, 0.437, 0.53, 0.5? (a) 0.091 (b) 0.437 (c) 0.53 (d) 0.5
  24. 24.Which is the greatest: 0.8, 0.021, 0.714, 0.81? (a) 0.8 (b) 0.021 (c) 0.714 (d) 0.81
  25. 25.Which is the smallest: 0.4, 0.023, 0.47, 0.376? (a) 0.4 (b) 0.023 (c) 0.47 (d) 0.376
  26. 26.3.42 + 5.7 = ? (a) 3.99 (b) 9.12 (c) 9.22 (d) 9.02
  27. 27.5.59 + 7.1 = ? (a) 12.79 (b) 12.69 (c) 12.59 (d) 6.3
  28. 28.Which is the greatest: 0.033, 0.75, 0.624, 0.7? (a) 0.033 (b) 0.75 (c) 0.624 (d) 0.7
  29. 29.6.45 + 1.4 = ? (a) 7.95 (b) 6.59 (c) 7.75 (d) 7.85
  30. 30.What is the value of the digit 9 in 13.926? (a) 9 (b) 0.09 (c) 0.009 (d) 0.9
  31. 31.What is the value of the digit 9 in 83.629? (a) 0.9 (b) 0.09 (c) 0.009 (d) 9
  32. 32.Which is the greatest: 0.039, 0.8, 0.736, 0.87? (a) 0.039 (b) 0.8 (c) 0.736 (d) 0.87
  33. 33.What is the value of the digit 7 in 82.673? (a) 7 (b) 0.07 (c) 0.7 (d) 0.007
  34. 34.What is the value of the digit 5 in 21.345? (a) 5 (b) 0.05 (c) 0.005 (d) 0.5
  35. 35.Which is the smallest: 0.25, 0.2, 0.171, 0.016? (a) 0.25 (b) 0.2 (c) 0.171 (d) 0.016
  36. 36.7.71 + 1.4 = ? (a) 9.11 (b) 9.01 (c) 9.21 (d) 7.85
  37. 37.Which is the smallest: 0.72, 0.7, 0.036, 0.621? (a) 0.72 (b) 0.7 (c) 0.036 (d) 0.621
  38. 38.5.71 + 8.9 = ? (a) 14.71 (b) 14.61 (c) 6.6 (d) 14.51
  39. 39.What is the value of the digit 2 in 95.261? (a) 2 (b) 0.002 (c) 0.02 (d) 0.2
  40. 40.Which is the smallest: 0.83, 0.746, 0.051, 0.8? (a) 0.83 (b) 0.746 (c) 0.051 (d) 0.8

Answer key

  1. 13.93
  2. 20
  3. 5.37
  4. 0.53
  5. 0.4
  6. 14.98
  7. 10.02
  8. 11.81
  9. 0.032
  10. 17.16
  11. 0.088
  12. 12.99
  13. 1
  14. 0.27
  15. 1
  16. 15.21
  17. 12.26
  18. 8.06
  19. 0.011
  20. 0.03
  21. 0.061
  22. 8.17
  23. 0.091
  24. 0.81
  25. 0.023
  26. 9.12
  27. 12.69
  28. 0.75
  29. 7.85
  30. 0.9
  31. 0.009
  32. 0.87
  33. 0.07
  34. 0.005
  35. 0.016
  36. 9.11
  37. 0.036
  38. 14.61
  39. 0.2
  40. 0.051

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