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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 55 · 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. 1.3.08 + 4.4 = ? (a) 7.38 (b) 7.48 (c) 3.52 (d) 7.58
  2. 2.What is the value of the digit 2 in 26.359? (a) 0.02 (b) 2 (c) 20 (d) 0.2
  3. 3.5.48 + 6.8 = ? (a) 12.28 (b) 12.38 (c) 12.18 (d) 6.16
  4. 4.What is the value of the digit 1 in 31.245? (a) 1 (b) 0.1 (c) 10 (d) 0.01
  5. 5.4.42 + 4.3 = ? (a) 8.82 (b) 8.62 (c) 8.72 (d) 4.85
  6. 6.5.32 + 3.2 = ? (a) 5.64 (b) 8.42 (c) 8.62 (d) 8.52
  7. 7.3.91 + 6.3 = ? (a) 10.11 (b) 10.31 (c) 10.21 (d) 4.54
  8. 8.2.85 + 8.6 = ? (a) 11.35 (b) 3.71 (c) 11.55 (d) 11.45
  9. 9.7.22 + 6.7 = ? (a) 13.82 (b) 14.02 (c) 13.92 (d) 7.89
  10. 10.Which is the smallest: 0.058, 0.8, 0.83, 0.795? (a) 0.058 (b) 0.8 (c) 0.83 (d) 0.795
  11. 11.Which is the smallest: 0.063, 0.365, 0.4, 0.46? (a) 0.063 (b) 0.365 (c) 0.4 (d) 0.46
  12. 12.What is the value of the digit 7 in 39.617? (a) 7 (b) 0.7 (c) 0.07 (d) 0.007
  13. 13.Which is the greatest: 0.6, 0.026, 0.62, 0.589? (a) 0.6 (b) 0.026 (c) 0.62 (d) 0.589
  14. 14.Which is the greatest: 0.6, 0.539, 0.69, 0.021? (a) 0.6 (b) 0.539 (c) 0.69 (d) 0.021
  15. 15.What is the value of the digit 9 in 13.894? (a) 0.09 (b) 9 (c) 0.9 (d) 0.009
  16. 16.1.57 + 6.2 = ? (a) 7.77 (b) 7.67 (c) 7.87 (d) 2.19
  17. 17.Which is the greatest: 0.4, 0.48, 0.061, 0.335? (a) 0.4 (b) 0.48 (c) 0.061 (d) 0.335
  18. 18.Which is the greatest: 0.7, 0.026, 0.662, 0.74? (a) 0.7 (b) 0.026 (c) 0.662 (d) 0.74
  19. 19.What is the value of the digit 1 in 61.758? (a) 1 (b) 0.1 (c) 0.01 (d) 10
  20. 20.Which is the greatest: 0.69, 0.6, 0.043, 0.538? (a) 0.69 (b) 0.6 (c) 0.043 (d) 0.538
  21. 21.1.23 + 6.8 = ? (a) 1.91 (b) 8.03 (c) 8.13 (d) 7.93
  22. 22.What is the value of the digit 6 in 56.249? (a) 0.06 (b) 6 (c) 0.6 (d) 60
  23. 23.Which is the greatest: 0.49, 0.045, 0.381, 0.4? (a) 0.49 (b) 0.045 (c) 0.381 (d) 0.4
  24. 24.What is the value of the digit 7 in 42.175? (a) 0.7 (b) 0.07 (c) 0.007 (d) 7
  25. 25.Which is the greatest: 0.4, 0.45, 0.331, 0.057? (a) 0.4 (b) 0.45 (c) 0.331 (d) 0.057
  26. 26.8.19 + 1.4 = ? (a) 9.59 (b) 9.49 (c) 9.69 (d) 8.33
  27. 27.2.81 + 9.5 = ? (a) 12.31 (b) 12.21 (c) 12.41 (d) 3.76
  28. 28.3.49 + 8.3 = ? (a) 11.89 (b) 11.79 (c) 4.32 (d) 11.69
  29. 29.Which is the smallest: 0.8, 0.726, 0.037, 0.83? (a) 0.8 (b) 0.726 (c) 0.037 (d) 0.83
  30. 30.Which is the greatest: 0.2, 0.25, 0.043, 0.184? (a) 0.2 (b) 0.25 (c) 0.043 (d) 0.184
  31. 31.Which is the greatest: 0.76, 0.044, 0.621, 0.7? (a) 0.76 (b) 0.044 (c) 0.621 (d) 0.7
  32. 32.2.31 + 3.4 = ? (a) 2.65 (b) 5.81 (c) 5.71 (d) 5.61
  33. 33.8.23 + 4.8 = ? (a) 13.03 (b) 8.71 (c) 12.93 (d) 13.13
  34. 34.1.87 + 3.7 = ? (a) 5.57 (b) 5.67 (c) 5.47 (d) 2.24
  35. 35.8.67 + 5.8 = ? (a) 14.37 (b) 14.47 (c) 14.57 (d) 9.25
  36. 36.Which is the smallest: 0.4, 0.43, 0.372, 0.019? (a) 0.4 (b) 0.43 (c) 0.372 (d) 0.019
  37. 37.2.01 + 5.9 = ? (a) 8.01 (b) 2.6 (c) 7.81 (d) 7.91
  38. 38.3.67 + 2.2 = ? (a) 3.89 (b) 5.77 (c) 5.97 (d) 5.87
  39. 39.7.22 + 6.8 = ? (a) 13.92 (b) 14.12 (c) 14.02 (d) 7.9
  40. 40.Which is the smallest: 0.56, 0.432, 0.067, 0.5? (a) 0.56 (b) 0.432 (c) 0.067 (d) 0.5

Answer key

  1. 7.48
  2. 20
  3. 12.28
  4. 1
  5. 8.72
  6. 8.52
  7. 10.21
  8. 11.45
  9. 13.92
  10. 0.058
  11. 0.063
  12. 0.007
  13. 0.62
  14. 0.69
  15. 0.09
  16. 7.77
  17. 0.48
  18. 0.74
  19. 1
  20. 0.69
  21. 8.03
  22. 6
  23. 0.49
  24. 0.07
  25. 0.45
  26. 9.59
  27. 12.31
  28. 11.79
  29. 0.037
  30. 0.25
  31. 0.76
  32. 5.71
  33. 13.03
  34. 5.57
  35. 14.47
  36. 0.019
  37. 7.91
  38. 5.87
  39. 14.02
  40. 0.067

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