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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 334 · 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. 1.6.21 + 3.2 = ? (a) 9.31 (b) 9.41 (c) 6.53 (d) 9.51
  2. 2.7.91 + 9.1 = ? (a) 17.11 (b) 16.91 (c) 8.82 (d) 17.01
  3. 3.What is the value of the digit 1 in 14.687? (a) 0.1 (b) 10 (c) 1 (d) 0.01
  4. 4.9.87 + 8.8 = ? (a) 10.75 (b) 18.67 (c) 18.57 (d) 18.77
  5. 5.Which is the greatest: 0.038, 0.76, 0.7, 0.642? (a) 0.038 (b) 0.76 (c) 0.7 (d) 0.642
  6. 6.What is the value of the digit 3 in 93.172? (a) 30 (b) 0.3 (c) 3 (d) 0.03
  7. 7.What is the value of the digit 9 in 34.729? (a) 9 (b) 0.09 (c) 0.9 (d) 0.009
  8. 8.1.02 + 3.1 = ? (a) 4.12 (b) 4.22 (c) 4.02 (d) 1.33
  9. 9.Which is the greatest: 0.031, 0.778, 0.8, 0.89? (a) 0.031 (b) 0.778 (c) 0.8 (d) 0.89
  10. 10.3.51 + 5.6 = ? (a) 9.11 (b) 4.07 (c) 9.21 (d) 9.01
  11. 11.What is the value of the digit 8 in 68.957? (a) 80 (b) 0.08 (c) 0.8 (d) 8
  12. 12.Which is the greatest: 0.237, 0.094, 0.39, 0.3? (a) 0.237 (b) 0.094 (c) 0.39 (d) 0.3
  13. 13.Which is the smallest: 0.171, 0.013, 0.2, 0.26? (a) 0.171 (b) 0.013 (c) 0.2 (d) 0.26
  14. 14.Which is the greatest: 0.133, 0.28, 0.2, 0.045? (a) 0.133 (b) 0.28 (c) 0.2 (d) 0.045
  15. 15.Which is the smallest: 0.82, 0.8, 0.722, 0.048? (a) 0.82 (b) 0.8 (c) 0.722 (d) 0.048
  16. 16.5.82 + 1.9 = ? (a) 7.82 (b) 7.62 (c) 7.72 (d) 6.01
  17. 17.4.37 + 3.4 = ? (a) 7.87 (b) 4.71 (c) 7.67 (d) 7.77
  18. 18.Which is the smallest: 0.278, 0.33, 0.056, 0.3? (a) 0.278 (b) 0.33 (c) 0.056 (d) 0.3
  19. 19.6.59 + 4.6 = ? (a) 11.19 (b) 11.29 (c) 11.09 (d) 7.05
  20. 20.3.01 + 4.5 = ? (a) 7.61 (b) 7.41 (c) 3.46 (d) 7.51
  21. 21.Which is the smallest: 0.5, 0.55, 0.447, 0.013? (a) 0.5 (b) 0.55 (c) 0.447 (d) 0.013
  22. 22.3.85 + 9.2 = ? (a) 13.05 (b) 12.95 (c) 13.15 (d) 4.77
  23. 23.Which is the greatest: 0.032, 0.56, 0.5, 0.413? (a) 0.032 (b) 0.56 (c) 0.5 (d) 0.413
  24. 24.What is the value of the digit 8 in 68.914? (a) 0.8 (b) 0.08 (c) 8 (d) 80
  25. 25.1.23 + 6.1 = ? (a) 1.84 (b) 7.33 (c) 7.43 (d) 7.23
  26. 26.1.23 + 8.5 = ? (a) 9.63 (b) 2.08 (c) 9.83 (d) 9.73
  27. 27.Which is the greatest: 0.067, 0.564, 0.62, 0.6? (a) 0.067 (b) 0.564 (c) 0.62 (d) 0.6
  28. 28.What is the value of the digit 7 in 71.945? (a) 7 (b) 0.7 (c) 70 (d) 0.07
  29. 29.4.22 + 8.3 = ? (a) 12.52 (b) 12.62 (c) 5.05 (d) 12.42
  30. 30.Which is the greatest: 0.2, 0.23, 0.065, 0.111? (a) 0.2 (b) 0.23 (c) 0.065 (d) 0.111
  31. 31.Which is the greatest: 0.53, 0.5, 0.042, 0.436? (a) 0.53 (b) 0.5 (c) 0.042 (d) 0.436
  32. 32.Which is the greatest: 0.6, 0.63, 0.021, 0.528? (a) 0.6 (b) 0.63 (c) 0.021 (d) 0.528
  33. 33.2.47 + 3.5 = ? (a) 6.07 (b) 5.87 (c) 2.82 (d) 5.97
  34. 34.What is the value of the digit 9 in 95.618? (a) 0.09 (b) 0.9 (c) 90 (d) 9
  35. 35.3.65 + 1.1 = ? (a) 4.75 (b) 4.85 (c) 4.65 (d) 3.76
  36. 36.6.61 + 8.5 = ? (a) 15.21 (b) 7.46 (c) 15.11 (d) 15.01
  37. 37.7.69 + 5.8 = ? (a) 13.59 (b) 13.39 (c) 8.27 (d) 13.49
  38. 38.What is the value of the digit 4 in 65.714? (a) 0.04 (b) 0.4 (c) 4 (d) 0.004
  39. 39.1.96 + 8.6 = ? (a) 10.66 (b) 10.46 (c) 2.82 (d) 10.56
  40. 40.What is the value of the digit 7 in 48.371? (a) 0.007 (b) 0.07 (c) 0.7 (d) 7

Answer key

  1. 9.41
  2. 17.01
  3. 10
  4. 18.67
  5. 0.76
  6. 3
  7. 0.009
  8. 4.12
  9. 0.89
  10. 9.11
  11. 8
  12. 0.39
  13. 0.013
  14. 0.28
  15. 0.048
  16. 7.72
  17. 7.77
  18. 0.056
  19. 11.19
  20. 7.51
  21. 0.013
  22. 13.05
  23. 0.56
  24. 8
  25. 7.33
  26. 9.73
  27. 0.62
  28. 70
  29. 12.52
  30. 0.23
  31. 0.53
  32. 0.63
  33. 5.97
  34. 90
  35. 4.75
  36. 15.11
  37. 13.49
  38. 0.004
  39. 10.56
  40. 0.07

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