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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 610 · 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. 1.3.51 + 7.8 = ? (a) 4.29 (b) 11.41 (c) 11.21 (d) 11.31
  2. 2.7.04 + 8.7 = ? (a) 15.64 (b) 15.84 (c) 15.74 (d) 7.91
  3. 3.Which is the smallest: 0.077, 0.155, 0.2, 0.25? (a) 0.077 (b) 0.155 (c) 0.2 (d) 0.25
  4. 4.Which is the smallest: 0.325, 0.067, 0.48, 0.4? (a) 0.325 (b) 0.067 (c) 0.48 (d) 0.4
  5. 5.What is the value of the digit 1 in 41.389? (a) 10 (b) 0.01 (c) 1 (d) 0.1
  6. 6.Which is the smallest: 0.715, 0.8, 0.85, 0.054? (a) 0.715 (b) 0.8 (c) 0.85 (d) 0.054
  7. 7.4.19 + 3.1 = ? (a) 7.39 (b) 7.29 (c) 7.19 (d) 4.5
  8. 8.8.76 + 7.5 = ? (a) 16.26 (b) 16.36 (c) 9.51 (d) 16.16
  9. 9.6.26 + 4.6 = ? (a) 6.72 (b) 10.96 (c) 10.76 (d) 10.86
  10. 10.3.27 + 8.2 = ? (a) 11.47 (b) 4.09 (c) 11.37 (d) 11.57
  11. 11.2.79 + 3.3 = ? (a) 6.09 (b) 3.12 (c) 6.19 (d) 5.99
  12. 12.Which is the greatest: 0.3, 0.028, 0.227, 0.35? (a) 0.3 (b) 0.028 (c) 0.227 (d) 0.35
  13. 13.Which is the greatest: 0.064, 0.27, 0.2, 0.171? (a) 0.064 (b) 0.27 (c) 0.2 (d) 0.171
  14. 14.What is the value of the digit 9 in 72.149? (a) 9 (b) 0.009 (c) 0.09 (d) 0.9
  15. 15.What is the value of the digit 4 in 71.624? (a) 0.4 (b) 0.04 (c) 4 (d) 0.004
  16. 16.What is the value of the digit 4 in 91.428? (a) 0.4 (b) 0.004 (c) 0.04 (d) 4
  17. 17.Which is the smallest: 0.612, 0.76, 0.7, 0.045? (a) 0.612 (b) 0.76 (c) 0.7 (d) 0.045
  18. 18.Which is the smallest: 0.7, 0.036, 0.77, 0.694? (a) 0.7 (b) 0.036 (c) 0.77 (d) 0.694
  19. 19.What is the value of the digit 1 in 31.725? (a) 0.1 (b) 0.01 (c) 10 (d) 1
  20. 20.What is the value of the digit 5 in 26.315? (a) 0.5 (b) 0.05 (c) 0.005 (d) 5
  21. 21.8.01 + 6.9 = ? (a) 15.01 (b) 14.81 (c) 8.7 (d) 14.91
  22. 22.8.88 + 5.3 = ? (a) 9.41 (b) 14.18 (c) 14.28 (d) 14.08
  23. 23.6.29 + 4.6 = ? (a) 10.99 (b) 10.89 (c) 10.79 (d) 6.75
  24. 24.6.41 + 2.6 = ? (a) 9.11 (b) 9.01 (c) 8.91 (d) 6.67
  25. 25.Which is the greatest: 0.788, 0.043, 0.85, 0.8? (a) 0.788 (b) 0.043 (c) 0.85 (d) 0.8
  26. 26.What is the value of the digit 3 in 32.795? (a) 3 (b) 30 (c) 0.3 (d) 0.03
  27. 27.What is the value of the digit 6 in 65.379? (a) 0.06 (b) 6 (c) 60 (d) 0.6
  28. 28.9.53 + 6.7 = ? (a) 10.2 (b) 16.13 (c) 16.23 (d) 16.33
  29. 29.What is the value of the digit 7 in 72.139? (a) 0.07 (b) 0.7 (c) 7 (d) 70
  30. 30.1.61 + 9.1 = ? (a) 2.52 (b) 10.81 (c) 10.61 (d) 10.71
  31. 31.Which is the smallest: 0.8, 0.015, 0.85, 0.779? (a) 0.8 (b) 0.015 (c) 0.85 (d) 0.779
  32. 32.Which is the smallest: 0.71, 0.088, 0.7, 0.633? (a) 0.71 (b) 0.088 (c) 0.7 (d) 0.633
  33. 33.Which is the smallest: 0.066, 0.42, 0.4, 0.337? (a) 0.066 (b) 0.42 (c) 0.4 (d) 0.337
  34. 34.What is the value of the digit 9 in 49.368? (a) 0.9 (b) 90 (c) 0.09 (d) 9
  35. 35.8.11 + 9.7 = ? (a) 9.08 (b) 17.91 (c) 17.81 (d) 17.71
  36. 36.2.36 + 9.8 = ? (a) 12.16 (b) 3.34 (c) 12.06 (d) 12.26
  37. 37.What is the value of the digit 4 in 25.941? (a) 4 (b) 0.004 (c) 0.04 (d) 0.4
  38. 38.Which is the smallest: 0.6, 0.043, 0.539, 0.69? (a) 0.6 (b) 0.043 (c) 0.539 (d) 0.69
  39. 39.7.64 + 9.4 = ? (a) 8.58 (b) 17.14 (c) 17.04 (d) 16.94
  40. 40.Which is the greatest: 0.31, 0.073, 0.219, 0.3? (a) 0.31 (b) 0.073 (c) 0.219 (d) 0.3

Answer key

  1. 11.31
  2. 15.74
  3. 0.077
  4. 0.067
  5. 1
  6. 0.054
  7. 7.29
  8. 16.26
  9. 10.86
  10. 11.47
  11. 6.09
  12. 0.35
  13. 0.27
  14. 0.009
  15. 0.004
  16. 0.4
  17. 0.045
  18. 0.036
  19. 1
  20. 0.005
  21. 14.91
  22. 14.18
  23. 10.89
  24. 9.01
  25. 0.85
  26. 30
  27. 60
  28. 16.23
  29. 70
  30. 10.71
  31. 0.015
  32. 0.088
  33. 0.066
  34. 9
  35. 17.81
  36. 12.16
  37. 0.04
  38. 0.043
  39. 17.04
  40. 0.31

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