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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 405 · 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. 1.2.14 + 7.1 = ? (a) 2.85 (b) 9.14 (c) 9.24 (d) 9.34
  2. 2.1.36 + 1.4 = ? (a) 2.66 (b) 1.5 (c) 2.76 (d) 2.86
  3. 3.Which is the greatest: 0.055, 0.653, 0.73, 0.7? (a) 0.055 (b) 0.653 (c) 0.73 (d) 0.7
  4. 4.5.03 + 4.5 = ? (a) 9.63 (b) 5.48 (c) 9.43 (d) 9.53
  5. 5.8.31 + 4.8 = ? (a) 8.79 (b) 13.21 (c) 13.01 (d) 13.11
  6. 6.6.61 + 1.4 = ? (a) 7.91 (b) 8.11 (c) 8.01 (d) 6.75
  7. 7.What is the value of the digit 2 in 23.785? (a) 2 (b) 0.2 (c) 0.02 (d) 20
  8. 8.1.72 + 9.4 = ? (a) 11.02 (b) 11.22 (c) 2.66 (d) 11.12
  9. 9.Which is the greatest: 0.217, 0.31, 0.3, 0.098? (a) 0.217 (b) 0.31 (c) 0.3 (d) 0.098
  10. 10.What is the value of the digit 8 in 36.894? (a) 0.008 (b) 8 (c) 0.08 (d) 0.8
  11. 11.What is the value of the digit 1 in 32.891? (a) 0.1 (b) 1 (c) 0.01 (d) 0.001
  12. 12.Which is the smallest: 0.053, 0.4, 0.323, 0.42? (a) 0.053 (b) 0.4 (c) 0.323 (d) 0.42
  13. 13.What is the value of the digit 1 in 71.263? (a) 10 (b) 1 (c) 0.01 (d) 0.1
  14. 14.Which is the smallest: 0.7, 0.634, 0.039, 0.76? (a) 0.7 (b) 0.634 (c) 0.039 (d) 0.76
  15. 15.Which is the greatest: 0.693, 0.087, 0.7, 0.73? (a) 0.693 (b) 0.087 (c) 0.7 (d) 0.73
  16. 16.5.94 + 4.1 = ? (a) 10.04 (b) 10.14 (c) 6.35 (d) 9.94
  17. 17.3.91 + 8.1 = ? (a) 4.72 (b) 12.01 (c) 11.91 (d) 12.11
  18. 18.What is the value of the digit 5 in 35.614? (a) 50 (b) 0.5 (c) 0.05 (d) 5
  19. 19.Which is the greatest: 0.7, 0.615, 0.79, 0.061? (a) 0.7 (b) 0.615 (c) 0.79 (d) 0.061
  20. 20.5.09 + 1.5 = ? (a) 5.24 (b) 6.49 (c) 6.59 (d) 6.69
  21. 21.Which is the greatest: 0.039, 0.8, 0.86, 0.771? (a) 0.039 (b) 0.8 (c) 0.86 (d) 0.771
  22. 22.2.21 + 6.1 = ? (a) 8.21 (b) 2.82 (c) 8.41 (d) 8.31
  23. 23.What is the value of the digit 8 in 32.184? (a) 0.008 (b) 8 (c) 0.08 (d) 0.8
  24. 24.8.05 + 7.9 = ? (a) 15.85 (b) 16.05 (c) 8.84 (d) 15.95
  25. 25.Which is the greatest: 0.028, 0.22, 0.151, 0.2? (a) 0.028 (b) 0.22 (c) 0.151 (d) 0.2
  26. 26.5.93 + 5.2 = ? (a) 11.03 (b) 11.23 (c) 11.13 (d) 6.45
  27. 27.2.47 + 2.1 = ? (a) 4.57 (b) 2.68 (c) 4.67 (d) 4.47
  28. 28.6.71 + 5.1 = ? (a) 11.71 (b) 11.81 (c) 7.22 (d) 11.91
  29. 29.7.28 + 8.1 = ? (a) 8.09 (b) 15.28 (c) 15.38 (d) 15.48
  30. 30.What is the value of the digit 3 in 45.831? (a) 0.3 (b) 3 (c) 0.03 (d) 0.003
  31. 31.6.81 + 3.9 = ? (a) 10.81 (b) 7.2 (c) 10.71 (d) 10.61
  32. 32.Which is the greatest: 0.134, 0.23, 0.013, 0.2? (a) 0.134 (b) 0.23 (c) 0.013 (d) 0.2
  33. 33.What is the value of the digit 1 in 51.894? (a) 0.1 (b) 1 (c) 10 (d) 0.01
  34. 34.Which is the smallest: 0.646, 0.7, 0.78, 0.029? (a) 0.646 (b) 0.7 (c) 0.78 (d) 0.029
  35. 35.What is the value of the digit 1 in 45.913? (a) 1 (b) 0.01 (c) 0.001 (d) 0.1
  36. 36.Which is the smallest: 0.477, 0.5, 0.59, 0.062? (a) 0.477 (b) 0.5 (c) 0.59 (d) 0.062
  37. 37.4.75 + 8.7 = ? (a) 5.62 (b) 13.35 (c) 13.55 (d) 13.45
  38. 38.What is the value of the digit 1 in 45.172? (a) 0.001 (b) 1 (c) 0.01 (d) 0.1
  39. 39.4.24 + 8.4 = ? (a) 5.08 (b) 12.64 (c) 12.74 (d) 12.54
  40. 40.What is the value of the digit 7 in 71.634? (a) 0.7 (b) 7 (c) 0.07 (d) 70

Answer key

  1. 9.24
  2. 2.76
  3. 0.73
  4. 9.53
  5. 13.11
  6. 8.01
  7. 20
  8. 11.12
  9. 0.31
  10. 0.8
  11. 0.001
  12. 0.053
  13. 1
  14. 0.039
  15. 0.73
  16. 10.04
  17. 12.01
  18. 5
  19. 0.79
  20. 6.59
  21. 0.86
  22. 8.31
  23. 0.08
  24. 15.95
  25. 0.22
  26. 11.13
  27. 4.57
  28. 11.81
  29. 15.38
  30. 0.03
  31. 10.71
  32. 0.23
  33. 1
  34. 0.029
  35. 0.01
  36. 0.062
  37. 13.45
  38. 0.1
  39. 12.64
  40. 70

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