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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 687 · 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. 1.3.94 + 5.5 = ? (a) 9.54 (b) 4.49 (c) 9.44 (d) 9.34
  2. 2.5.84 + 3.6 = ? (a) 9.34 (b) 6.2 (c) 9.54 (d) 9.44
  3. 3.Which is the smallest: 0.6, 0.62, 0.561, 0.078? (a) 0.6 (b) 0.62 (c) 0.561 (d) 0.078
  4. 4.4.33 + 2.7 = ? (a) 7.13 (b) 4.6 (c) 7.03 (d) 6.93
  5. 5.Which is the greatest: 0.161, 0.21, 0.017, 0.2? (a) 0.161 (b) 0.21 (c) 0.017 (d) 0.2
  6. 6.Which is the greatest: 0.588, 0.6, 0.65, 0.031? (a) 0.588 (b) 0.6 (c) 0.65 (d) 0.031
  7. 7.3.37 + 3.5 = ? (a) 6.77 (b) 3.72 (c) 6.87 (d) 6.97
  8. 8.Which is the smallest: 0.58, 0.098, 0.5, 0.464? (a) 0.58 (b) 0.098 (c) 0.5 (d) 0.464
  9. 9.What is the value of the digit 1 in 91.345? (a) 0.01 (b) 1 (c) 0.1 (d) 10
  10. 10.Which is the smallest: 0.065, 0.42, 0.4, 0.323? (a) 0.065 (b) 0.42 (c) 0.4 (d) 0.323
  11. 11.4.38 + 7.6 = ? (a) 11.88 (b) 11.98 (c) 12.08 (d) 5.14
  12. 12.What is the value of the digit 8 in 82.694? (a) 80 (b) 8 (c) 0.8 (d) 0.08
  13. 13.9.33 + 2.7 = ? (a) 12.03 (b) 12.13 (c) 9.6 (d) 11.93
  14. 14.What is the value of the digit 6 in 46.238? (a) 0.6 (b) 0.06 (c) 60 (d) 6
  15. 15.What is the value of the digit 4 in 36.742? (a) 4 (b) 0.4 (c) 0.004 (d) 0.04
  16. 16.3.22 + 9.4 = ? (a) 4.16 (b) 12.52 (c) 12.72 (d) 12.62
  17. 17.Which is the smallest: 0.7, 0.71, 0.042, 0.637? (a) 0.7 (b) 0.71 (c) 0.042 (d) 0.637
  18. 18.9.14 + 8.5 = ? (a) 9.99 (b) 17.74 (c) 17.64 (d) 17.54
  19. 19.6.61 + 9.5 = ? (a) 16.21 (b) 16.01 (c) 16.11 (d) 7.56
  20. 20.5.23 + 4.6 = ? (a) 9.93 (b) 9.83 (c) 9.73 (d) 5.69
  21. 21.Which is the smallest: 0.732, 0.072, 0.86, 0.8? (a) 0.732 (b) 0.072 (c) 0.86 (d) 0.8
  22. 22.Which is the greatest: 0.25, 0.032, 0.2, 0.132? (a) 0.25 (b) 0.032 (c) 0.2 (d) 0.132
  23. 23.1.53 + 7.6 = ? (a) 9.03 (b) 9.23 (c) 2.29 (d) 9.13
  24. 24.8.38 + 8.8 = ? (a) 9.26 (b) 17.18 (c) 17.08 (d) 17.28
  25. 25.What is the value of the digit 2 in 82.176? (a) 0.02 (b) 20 (c) 0.2 (d) 2
  26. 26.7.98 + 1.7 = ? (a) 9.58 (b) 9.78 (c) 9.68 (d) 8.15
  27. 27.5.51 + 2.9 = ? (a) 5.8 (b) 8.41 (c) 8.51 (d) 8.31
  28. 28.4.87 + 1.6 = ? (a) 6.57 (b) 5.03 (c) 6.47 (d) 6.37
  29. 29.6.71 + 4.5 = ? (a) 7.16 (b) 11.11 (c) 11.21 (d) 11.31
  30. 30.What is the value of the digit 3 in 96.382? (a) 0.003 (b) 3 (c) 0.3 (d) 0.03
  31. 31.5.97 + 8.8 = ? (a) 14.67 (b) 6.85 (c) 14.87 (d) 14.77
  32. 32.Which is the smallest: 0.61, 0.515, 0.6, 0.037? (a) 0.61 (b) 0.515 (c) 0.6 (d) 0.037
  33. 33.What is the value of the digit 5 in 59.816? (a) 5 (b) 0.05 (c) 50 (d) 0.5
  34. 34.7.61 + 5.1 = ? (a) 12.71 (b) 8.12 (c) 12.61 (d) 12.81
  35. 35.What is the value of the digit 9 in 92.168? (a) 90 (b) 0.9 (c) 0.09 (d) 9
  36. 36.4.91 + 7.9 = ? (a) 5.7 (b) 12.71 (c) 12.81 (d) 12.91
  37. 37.6.68 + 2.9 = ? (a) 9.48 (b) 9.58 (c) 6.97 (d) 9.68
  38. 38.9.98 + 8.8 = ? (a) 18.88 (b) 18.68 (c) 18.78 (d) 10.86
  39. 39.What is the value of the digit 4 in 48.395? (a) 4 (b) 40 (c) 0.04 (d) 0.4
  40. 40.3.11 + 6.1 = ? (a) 9.21 (b) 3.72 (c) 9.31 (d) 9.11

Answer key

  1. 9.44
  2. 9.44
  3. 0.078
  4. 7.03
  5. 0.21
  6. 0.65
  7. 6.87
  8. 0.098
  9. 1
  10. 0.065
  11. 11.98
  12. 80
  13. 12.03
  14. 6
  15. 0.04
  16. 12.62
  17. 0.042
  18. 17.64
  19. 16.11
  20. 9.83
  21. 0.072
  22. 0.25
  23. 9.13
  24. 17.18
  25. 2
  26. 9.68
  27. 8.41
  28. 6.47
  29. 11.21
  30. 0.3
  31. 14.77
  32. 0.037
  33. 50
  34. 12.71
  35. 90
  36. 12.81
  37. 9.58
  38. 18.78
  39. 40
  40. 9.21

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