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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 564 · 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. 1.8.08 + 3.5 = ? (a) 11.48 (b) 8.43 (c) 11.58 (d) 11.68
  2. 2.2.69 + 5.3 = ? (a) 3.22 (b) 7.89 (c) 8.09 (d) 7.99
  3. 3.1.28 + 1.6 = ? (a) 2.98 (b) 2.78 (c) 1.44 (d) 2.88
  4. 4.Which is the smallest: 0.023, 0.71, 0.682, 0.7? (a) 0.023 (b) 0.71 (c) 0.682 (d) 0.7
  5. 5.7.27 + 8.3 = ? (a) 8.1 (b) 15.67 (c) 15.57 (d) 15.47
  6. 6.Which is the greatest: 0.4, 0.41, 0.393, 0.099? (a) 0.4 (b) 0.41 (c) 0.393 (d) 0.099
  7. 7.5.02 + 9.1 = ? (a) 5.93 (b) 14.02 (c) 14.12 (d) 14.22
  8. 8.7.52 + 7.7 = ? (a) 15.12 (b) 15.32 (c) 15.22 (d) 8.29
  9. 9.What is the value of the digit 5 in 12.365? (a) 0.5 (b) 5 (c) 0.05 (d) 0.005
  10. 10.What is the value of the digit 8 in 18.279? (a) 80 (b) 8 (c) 0.08 (d) 0.8
  11. 11.What is the value of the digit 5 in 75.681? (a) 0.05 (b) 50 (c) 0.5 (d) 5
  12. 12.5.93 + 4.5 = ? (a) 10.43 (b) 10.53 (c) 6.38 (d) 10.33
  13. 13.5.12 + 8.8 = ? (a) 13.82 (b) 6 (c) 14.02 (d) 13.92
  14. 14.Which is the greatest: 0.091, 0.35, 0.3, 0.222? (a) 0.091 (b) 0.35 (c) 0.3 (d) 0.222
  15. 15.9.45 + 8.3 = ? (a) 17.85 (b) 10.28 (c) 17.65 (d) 17.75
  16. 16.Which is the greatest: 0.86, 0.016, 0.8, 0.776? (a) 0.86 (b) 0.016 (c) 0.8 (d) 0.776
  17. 17.Which is the greatest: 0.222, 0.3, 0.047, 0.31? (a) 0.222 (b) 0.3 (c) 0.047 (d) 0.31
  18. 18.What is the value of the digit 8 in 64.285? (a) 0.8 (b) 0.008 (c) 8 (d) 0.08
  19. 19.6.99 + 5.7 = ? (a) 12.69 (b) 7.56 (c) 12.79 (d) 12.59
  20. 20.What is the value of the digit 2 in 28.753? (a) 2 (b) 0.2 (c) 20 (d) 0.02
  21. 21.What is the value of the digit 9 in 43.891? (a) 0.9 (b) 0.009 (c) 9 (d) 0.09
  22. 22.Which is the greatest: 0.091, 0.86, 0.8, 0.719? (a) 0.091 (b) 0.86 (c) 0.8 (d) 0.719
  23. 23.2.73 + 4.4 = ? (a) 7.23 (b) 7.03 (c) 7.13 (d) 3.17
  24. 24.Which is the greatest: 0.3, 0.39, 0.257, 0.025? (a) 0.3 (b) 0.39 (c) 0.257 (d) 0.025
  25. 25.9.51 + 1.7 = ? (a) 11.21 (b) 9.68 (c) 11.11 (d) 11.31
  26. 26.What is the value of the digit 9 in 24.859? (a) 0.9 (b) 0.009 (c) 9 (d) 0.09
  27. 27.Which is the greatest: 0.531, 0.066, 0.6, 0.66? (a) 0.531 (b) 0.066 (c) 0.6 (d) 0.66
  28. 28.What is the value of the digit 6 in 34.561? (a) 0.6 (b) 0.06 (c) 6 (d) 0.006
  29. 29.What is the value of the digit 1 in 38.219? (a) 0.01 (b) 0.1 (c) 1 (d) 0.001
  30. 30.1.91 + 1.7 = ? (a) 3.71 (b) 2.08 (c) 3.61 (d) 3.51
  31. 31.Which is the greatest: 0.62, 0.521, 0.085, 0.6? (a) 0.62 (b) 0.521 (c) 0.085 (d) 0.6
  32. 32.Which is the greatest: 0.025, 0.6, 0.514, 0.61? (a) 0.025 (b) 0.6 (c) 0.514 (d) 0.61
  33. 33.7.03 + 8.4 = ? (a) 15.43 (b) 7.87 (c) 15.33 (d) 15.53
  34. 34.Which is the greatest: 0.629, 0.061, 0.7, 0.79? (a) 0.629 (b) 0.061 (c) 0.7 (d) 0.79
  35. 35.Which is the greatest: 0.21, 0.2, 0.051, 0.119? (a) 0.21 (b) 0.2 (c) 0.051 (d) 0.119
  36. 36.What is the value of the digit 1 in 23.417? (a) 0.01 (b) 0.001 (c) 1 (d) 0.1
  37. 37.8.35 + 4.3 = ? (a) 12.65 (b) 12.55 (c) 12.75 (d) 8.78
  38. 38.5.11 + 9.3 = ? (a) 14.51 (b) 6.04 (c) 14.41 (d) 14.31
  39. 39.Which is the greatest: 0.089, 0.639, 0.79, 0.7? (a) 0.089 (b) 0.639 (c) 0.79 (d) 0.7
  40. 40.What is the value of the digit 9 in 95.437? (a) 90 (b) 9 (c) 0.09 (d) 0.9

Answer key

  1. 11.58
  2. 7.99
  3. 2.88
  4. 0.023
  5. 15.57
  6. 0.41
  7. 14.12
  8. 15.22
  9. 0.005
  10. 8
  11. 5
  12. 10.43
  13. 13.92
  14. 0.35
  15. 17.75
  16. 0.86
  17. 0.31
  18. 0.08
  19. 12.69
  20. 20
  21. 0.09
  22. 0.86
  23. 7.13
  24. 0.39
  25. 11.21
  26. 0.009
  27. 0.66
  28. 0.06
  29. 0.01
  30. 3.61
  31. 0.62
  32. 0.61
  33. 15.43
  34. 0.79
  35. 0.21
  36. 0.01
  37. 12.65
  38. 14.41
  39. 0.79
  40. 90

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