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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 28 · 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. 1.1.21 + 2.5 = ? (a) 3.81 (b) 1.46 (c) 3.71 (d) 3.61
  2. 2.2.72 + 9.1 = ? (a) 11.72 (b) 3.63 (c) 11.92 (d) 11.82
  3. 3.Which is the smallest: 0.4, 0.44, 0.037, 0.377? (a) 0.4 (b) 0.44 (c) 0.037 (d) 0.377
  4. 4.What is the value of the digit 1 in 97.218? (a) 1 (b) 0.01 (c) 0.1 (d) 0.001
  5. 5.7.96 + 3.1 = ? (a) 8.27 (b) 11.06 (c) 11.16 (d) 10.96
  6. 6.Which is the smallest: 0.693, 0.7, 0.77, 0.029? (a) 0.693 (b) 0.7 (c) 0.77 (d) 0.029
  7. 7.8.11 + 2.1 = ? (a) 10.21 (b) 10.11 (c) 8.32 (d) 10.31
  8. 8.Which is the smallest: 0.644, 0.79, 0.018, 0.7? (a) 0.644 (b) 0.79 (c) 0.018 (d) 0.7
  9. 9.1.84 + 4.1 = ? (a) 5.84 (b) 2.25 (c) 6.04 (d) 5.94
  10. 10.8.41 + 7.6 = ? (a) 16.11 (b) 15.91 (c) 9.17 (d) 16.01
  11. 11.What is the value of the digit 4 in 54.728? (a) 0.4 (b) 40 (c) 4 (d) 0.04
  12. 12.What is the value of the digit 7 in 72.935? (a) 70 (b) 0.07 (c) 7 (d) 0.7
  13. 13.6.24 + 4.4 = ? (a) 10.64 (b) 10.74 (c) 6.68 (d) 10.54
  14. 14.8.34 + 9.3 = ? (a) 9.27 (b) 17.74 (c) 17.64 (d) 17.54
  15. 15.5.86 + 7.7 = ? (a) 13.46 (b) 13.56 (c) 6.63 (d) 13.66
  16. 16.What is the value of the digit 3 in 54.132? (a) 0.03 (b) 3 (c) 0.3 (d) 0.003
  17. 17.1.02 + 8.6 = ? (a) 1.88 (b) 9.62 (c) 9.52 (d) 9.72
  18. 18.What is the value of the digit 9 in 67.329? (a) 9 (b) 0.9 (c) 0.09 (d) 0.009
  19. 19.Which is the smallest: 0.066, 0.75, 0.7, 0.613? (a) 0.066 (b) 0.75 (c) 0.7 (d) 0.613
  20. 20.What is the value of the digit 7 in 79.462? (a) 0.7 (b) 7 (c) 70 (d) 0.07
  21. 21.3.15 + 4.8 = ? (a) 7.85 (b) 8.05 (c) 7.95 (d) 3.63
  22. 22.3.27 + 9.3 = ? (a) 12.57 (b) 12.67 (c) 4.2 (d) 12.47
  23. 23.Which is the greatest: 0.4, 0.011, 0.45, 0.342? (a) 0.4 (b) 0.011 (c) 0.45 (d) 0.342
  24. 24.9.57 + 2.4 = ? (a) 12.07 (b) 11.87 (c) 11.97 (d) 9.81
  25. 25.7.25 + 9.5 = ? (a) 16.75 (b) 8.2 (c) 16.65 (d) 16.85
  26. 26.What is the value of the digit 4 in 54.816? (a) 0.4 (b) 40 (c) 4 (d) 0.04
  27. 27.Which is the smallest: 0.189, 0.2, 0.27, 0.022? (a) 0.189 (b) 0.2 (c) 0.27 (d) 0.022
  28. 28.2.47 + 8.1 = ? (a) 10.47 (b) 10.57 (c) 10.67 (d) 3.28
  29. 29.2.99 + 7.6 = ? (a) 10.69 (b) 10.49 (c) 10.59 (d) 3.75
  30. 30.What is the value of the digit 3 in 94.367? (a) 3 (b) 0.03 (c) 0.003 (d) 0.3
  31. 31.What is the value of the digit 7 in 16.723? (a) 0.07 (b) 0.007 (c) 7 (d) 0.7
  32. 32.Which is the greatest: 0.094, 0.393, 0.4, 0.41? (a) 0.094 (b) 0.393 (c) 0.4 (d) 0.41
  33. 33.Which is the smallest: 0.431, 0.5, 0.59, 0.012? (a) 0.431 (b) 0.5 (c) 0.59 (d) 0.012
  34. 34.Which is the smallest: 0.057, 0.33, 0.252, 0.3? (a) 0.057 (b) 0.33 (c) 0.252 (d) 0.3
  35. 35.1.39 + 6.4 = ? (a) 7.89 (b) 2.03 (c) 7.79 (d) 7.69
  36. 36.6.88 + 6.5 = ? (a) 13.48 (b) 13.38 (c) 7.53 (d) 13.28
  37. 37.What is the value of the digit 2 in 81.742? (a) 0.2 (b) 0.02 (c) 2 (d) 0.002
  38. 38.Which is the greatest: 0.3, 0.055, 0.35, 0.288? (a) 0.3 (b) 0.055 (c) 0.35 (d) 0.288
  39. 39.Which is the smallest: 0.33, 0.3, 0.284, 0.027? (a) 0.33 (b) 0.3 (c) 0.284 (d) 0.027
  40. 40.Which is the greatest: 0.33, 0.029, 0.284, 0.3? (a) 0.33 (b) 0.029 (c) 0.284 (d) 0.3

Answer key

  1. 3.71
  2. 11.82
  3. 0.037
  4. 0.01
  5. 11.06
  6. 0.029
  7. 10.21
  8. 0.018
  9. 5.94
  10. 16.01
  11. 4
  12. 70
  13. 10.64
  14. 17.64
  15. 13.56
  16. 0.03
  17. 9.62
  18. 0.009
  19. 0.066
  20. 70
  21. 7.95
  22. 12.57
  23. 0.45
  24. 11.97
  25. 16.75
  26. 4
  27. 0.022
  28. 10.57
  29. 10.59
  30. 0.3
  31. 0.7
  32. 0.41
  33. 0.012
  34. 0.057
  35. 7.79
  36. 13.38
  37. 0.002
  38. 0.35
  39. 0.027
  40. 0.33

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