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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 519 · 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. 1.8.68 + 6.7 = ? (a) 15.48 (b) 9.35 (c) 15.38 (d) 15.28
  2. 2.5.08 + 1.7 = ? (a) 5.25 (b) 6.88 (c) 6.68 (d) 6.78
  3. 3.Which is the greatest: 0.24, 0.076, 0.2, 0.188? (a) 0.24 (b) 0.076 (c) 0.2 (d) 0.188
  4. 4.Which is the smallest: 0.73, 0.638, 0.077, 0.7? (a) 0.73 (b) 0.638 (c) 0.077 (d) 0.7
  5. 5.What is the value of the digit 8 in 81.326? (a) 8 (b) 80 (c) 0.8 (d) 0.08
  6. 6.8.92 + 3.1 = ? (a) 12.12 (b) 11.92 (c) 9.23 (d) 12.02
  7. 7.6.32 + 7.1 = ? (a) 7.03 (b) 13.42 (c) 13.32 (d) 13.52
  8. 8.Which is the greatest: 0.73, 0.082, 0.688, 0.7? (a) 0.73 (b) 0.082 (c) 0.688 (d) 0.7
  9. 9.3.85 + 5.4 = ? (a) 4.39 (b) 9.25 (c) 9.35 (d) 9.15
  10. 10.What is the value of the digit 5 in 35.472? (a) 50 (b) 0.05 (c) 0.5 (d) 5
  11. 11.7.55 + 2.2 = ? (a) 7.77 (b) 9.85 (c) 9.65 (d) 9.75
  12. 12.What is the value of the digit 3 in 12.934? (a) 3 (b) 0.03 (c) 0.003 (d) 0.3
  13. 13.What is the value of the digit 8 in 36.984? (a) 0.008 (b) 8 (c) 0.08 (d) 0.8
  14. 14.What is the value of the digit 5 in 48.951? (a) 0.005 (b) 5 (c) 0.05 (d) 0.5
  15. 15.Which is the smallest: 0.098, 0.3, 0.32, 0.252? (a) 0.098 (b) 0.3 (c) 0.32 (d) 0.252
  16. 16.Which is the smallest: 0.68, 0.6, 0.027, 0.545? (a) 0.68 (b) 0.6 (c) 0.027 (d) 0.545
  17. 17.3.63 + 2.8 = ? (a) 6.33 (b) 6.53 (c) 3.91 (d) 6.43
  18. 18.Which is the smallest: 0.031, 0.71, 0.7, 0.663? (a) 0.031 (b) 0.71 (c) 0.7 (d) 0.663
  19. 19.What is the value of the digit 4 in 89.456? (a) 0.4 (b) 4 (c) 0.004 (d) 0.04
  20. 20.Which is the greatest: 0.355, 0.43, 0.019, 0.4? (a) 0.355 (b) 0.43 (c) 0.019 (d) 0.4
  21. 21.8.94 + 2.4 = ? (a) 9.18 (b) 11.44 (c) 11.24 (d) 11.34
  22. 22.What is the value of the digit 2 in 71.328? (a) 0.002 (b) 2 (c) 0.02 (d) 0.2
  23. 23.Which is the smallest: 0.038, 0.28, 0.2, 0.184? (a) 0.038 (b) 0.28 (c) 0.2 (d) 0.184
  24. 24.3.91 + 6.8 = ? (a) 10.81 (b) 10.71 (c) 10.61 (d) 4.59
  25. 25.6.16 + 5.2 = ? (a) 6.68 (b) 11.26 (c) 11.36 (d) 11.46
  26. 26.9.91 + 4.1 = ? (a) 14.11 (b) 10.32 (c) 13.91 (d) 14.01
  27. 27.4.71 + 3.2 = ? (a) 5.03 (b) 8.01 (c) 7.81 (d) 7.91
  28. 28.Which is the greatest: 0.81, 0.013, 0.8, 0.711? (a) 0.81 (b) 0.013 (c) 0.8 (d) 0.711
  29. 29.What is the value of the digit 4 in 37.814? (a) 0.004 (b) 0.4 (c) 0.04 (d) 4
  30. 30.6.45 + 7.7 = ? (a) 14.05 (b) 14.25 (c) 7.22 (d) 14.15
  31. 31.What is the value of the digit 1 in 12.637? (a) 10 (b) 0.1 (c) 0.01 (d) 1
  32. 32.9.37 + 4.7 = ? (a) 13.97 (b) 14.07 (c) 9.84 (d) 14.17
  33. 33.2.26 + 8.8 = ? (a) 11.16 (b) 11.06 (c) 10.96 (d) 3.14
  34. 34.3.91 + 7.8 = ? (a) 11.81 (b) 11.61 (c) 11.71 (d) 4.69
  35. 35.Which is the smallest: 0.517, 0.62, 0.6, 0.023? (a) 0.517 (b) 0.62 (c) 0.6 (d) 0.023
  36. 36.8.73 + 3.1 = ? (a) 9.04 (b) 11.83 (c) 11.73 (d) 11.93
  37. 37.Which is the smallest: 0.092, 0.2, 0.112, 0.21? (a) 0.092 (b) 0.2 (c) 0.112 (d) 0.21
  38. 38.7.21 + 2.7 = ? (a) 9.81 (b) 10.01 (c) 7.48 (d) 9.91
  39. 39.4.92 + 3.8 = ? (a) 5.3 (b) 8.72 (c) 8.62 (d) 8.82
  40. 40.3.27 + 2.5 = ? (a) 5.77 (b) 3.52 (c) 5.67 (d) 5.87

Answer key

  1. 15.38
  2. 6.78
  3. 0.24
  4. 0.077
  5. 80
  6. 12.02
  7. 13.42
  8. 0.73
  9. 9.25
  10. 5
  11. 9.75
  12. 0.03
  13. 0.08
  14. 0.05
  15. 0.098
  16. 0.027
  17. 6.43
  18. 0.031
  19. 0.4
  20. 0.43
  21. 11.34
  22. 0.02
  23. 0.038
  24. 10.71
  25. 11.36
  26. 14.01
  27. 7.91
  28. 0.81
  29. 0.004
  30. 14.15
  31. 10
  32. 14.07
  33. 11.06
  34. 11.71
  35. 0.023
  36. 11.83
  37. 0.092
  38. 9.91
  39. 8.72
  40. 5.77

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