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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 239 · 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. 1.7.03 + 5.8 = ? (a) 7.61 (b) 12.93 (c) 12.73 (d) 12.83
  2. 2.Which is the greatest: 0.61, 0.6, 0.551, 0.079? (a) 0.61 (b) 0.6 (c) 0.551 (d) 0.079
  3. 3.Which is the smallest: 0.23, 0.189, 0.2, 0.034? (a) 0.23 (b) 0.189 (c) 0.2 (d) 0.034
  4. 4.What is the value of the digit 4 in 21.437? (a) 4 (b) 0.04 (c) 0.4 (d) 0.004
  5. 5.9.36 + 4.2 = ? (a) 13.46 (b) 13.56 (c) 13.66 (d) 9.78
  6. 6.4.17 + 1.3 = ? (a) 5.37 (b) 4.3 (c) 5.47 (d) 5.57
  7. 7.Which is the smallest: 0.622, 0.72, 0.081, 0.7? (a) 0.622 (b) 0.72 (c) 0.081 (d) 0.7
  8. 8.9.75 + 6.3 = ? (a) 10.38 (b) 16.05 (c) 15.95 (d) 16.15
  9. 9.3.89 + 2.8 = ? (a) 6.79 (b) 4.17 (c) 6.69 (d) 6.59
  10. 10.What is the value of the digit 1 in 19.825? (a) 1 (b) 10 (c) 0.01 (d) 0.1
  11. 11.Which is the smallest: 0.7, 0.673, 0.094, 0.76? (a) 0.7 (b) 0.673 (c) 0.094 (d) 0.76
  12. 12.Which is the smallest: 0.028, 0.339, 0.45, 0.4? (a) 0.028 (b) 0.339 (c) 0.45 (d) 0.4
  13. 13.What is the value of the digit 2 in 71.254? (a) 0.02 (b) 0.002 (c) 2 (d) 0.2
  14. 14.1.01 + 1.7 = ? (a) 1.18 (b) 2.71 (c) 2.81 (d) 2.61
  15. 15.3.02 + 3.2 = ? (a) 6.22 (b) 6.12 (c) 3.34 (d) 6.32
  16. 16.What is the value of the digit 3 in 34.975? (a) 30 (b) 3 (c) 0.03 (d) 0.3
  17. 17.Which is the smallest: 0.33, 0.3, 0.056, 0.273? (a) 0.33 (b) 0.3 (c) 0.056 (d) 0.273
  18. 18.2.88 + 7.1 = ? (a) 10.08 (b) 9.98 (c) 3.59 (d) 9.88
  19. 19.5.91 + 9.3 = ? (a) 15.21 (b) 15.31 (c) 6.84 (d) 15.11
  20. 20.3.42 + 7.3 = ? (a) 10.82 (b) 10.72 (c) 10.62 (d) 4.15
  21. 21.1.21 + 6.4 = ? (a) 7.61 (b) 7.71 (c) 7.51 (d) 1.85
  22. 22.Which is the smallest: 0.456, 0.5, 0.59, 0.027? (a) 0.456 (b) 0.5 (c) 0.59 (d) 0.027
  23. 23.What is the value of the digit 3 in 31.846? (a) 30 (b) 3 (c) 0.03 (d) 0.3
  24. 24.What is the value of the digit 3 in 94.813? (a) 3 (b) 0.003 (c) 0.03 (d) 0.3
  25. 25.9.93 + 9.2 = ? (a) 10.85 (b) 19.03 (c) 19.23 (d) 19.13
  26. 26.Which is the greatest: 0.26, 0.115, 0.2, 0.087? (a) 0.26 (b) 0.115 (c) 0.2 (d) 0.087
  27. 27.1.78 + 6.6 = ? (a) 8.38 (b) 2.44 (c) 8.48 (d) 8.28
  28. 28.What is the value of the digit 5 in 58.936? (a) 50 (b) 0.5 (c) 5 (d) 0.05
  29. 29.What is the value of the digit 8 in 32.846? (a) 0.8 (b) 0.008 (c) 0.08 (d) 8
  30. 30.5.16 + 4.1 = ? (a) 5.57 (b) 9.36 (c) 9.26 (d) 9.16
  31. 31.Which is the greatest: 0.8, 0.019, 0.798, 0.82? (a) 0.8 (b) 0.019 (c) 0.798 (d) 0.82
  32. 32.7.51 + 5.4 = ? (a) 13.01 (b) 12.81 (c) 8.05 (d) 12.91
  33. 33.2.16 + 4.8 = ? (a) 7.06 (b) 6.86 (c) 6.96 (d) 2.64
  34. 34.5.92 + 2.7 = ? (a) 8.52 (b) 8.62 (c) 8.72 (d) 6.19
  35. 35.Which is the smallest: 0.21, 0.2, 0.054, 0.145? (a) 0.21 (b) 0.2 (c) 0.054 (d) 0.145
  36. 36.What is the value of the digit 8 in 72.986? (a) 0.8 (b) 0.008 (c) 8 (d) 0.08
  37. 37.What is the value of the digit 7 in 84.769? (a) 7 (b) 0.7 (c) 0.07 (d) 0.007
  38. 38.What is the value of the digit 8 in 35.876? (a) 8 (b) 0.008 (c) 0.8 (d) 0.08
  39. 39.Which is the smallest: 0.736, 0.074, 0.83, 0.8? (a) 0.736 (b) 0.074 (c) 0.83 (d) 0.8
  40. 40.What is the value of the digit 5 in 42.759? (a) 0.005 (b) 0.5 (c) 5 (d) 0.05

Answer key

  1. 12.83
  2. 0.61
  3. 0.034
  4. 0.4
  5. 13.56
  6. 5.47
  7. 0.081
  8. 16.05
  9. 6.69
  10. 10
  11. 0.094
  12. 0.028
  13. 0.2
  14. 2.71
  15. 6.22
  16. 30
  17. 0.056
  18. 9.98
  19. 15.21
  20. 10.72
  21. 7.61
  22. 0.027
  23. 30
  24. 0.003
  25. 19.13
  26. 0.26
  27. 8.38
  28. 50
  29. 0.8
  30. 9.26
  31. 0.82
  32. 12.91
  33. 6.96
  34. 8.62
  35. 0.054
  36. 0.08
  37. 0.7
  38. 0.8
  39. 0.074
  40. 0.05

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