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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 643 · 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. 1.7.42 + 4.3 = ? (a) 7.85 (b) 11.62 (c) 11.82 (d) 11.72
  2. 2.3.97 + 6.6 = ? (a) 10.67 (b) 10.47 (c) 4.63 (d) 10.57
  3. 3.3.77 + 6.3 = ? (a) 10.07 (b) 4.4 (c) 9.97 (d) 10.17
  4. 4.Which is the smallest: 0.81, 0.016, 0.717, 0.8? (a) 0.81 (b) 0.016 (c) 0.717 (d) 0.8
  5. 5.7.81 + 8.1 = ? (a) 16.01 (b) 15.81 (c) 8.62 (d) 15.91
  6. 6.Which is the greatest: 0.63, 0.086, 0.514, 0.6? (a) 0.63 (b) 0.086 (c) 0.514 (d) 0.6
  7. 7.5.44 + 3.1 = ? (a) 8.54 (b) 5.75 (c) 8.64 (d) 8.44
  8. 8.Which is the greatest: 0.287, 0.33, 0.062, 0.3? (a) 0.287 (b) 0.33 (c) 0.062 (d) 0.3
  9. 9.Which is the smallest: 0.135, 0.21, 0.077, 0.2? (a) 0.135 (b) 0.21 (c) 0.077 (d) 0.2
  10. 10.What is the value of the digit 7 in 47.136? (a) 7 (b) 0.07 (c) 0.7 (d) 70
  11. 11.What is the value of the digit 2 in 48.237? (a) 0.2 (b) 2 (c) 0.02 (d) 0.002
  12. 12.1.31 + 1.7 = ? (a) 3.01 (b) 1.48 (c) 3.11 (d) 2.91
  13. 13.8.35 + 5.3 = ? (a) 13.75 (b) 13.65 (c) 13.55 (d) 8.88
  14. 14.What is the value of the digit 1 in 51.824? (a) 0.01 (b) 0.1 (c) 1 (d) 10
  15. 15.What is the value of the digit 9 in 93.214? (a) 0.9 (b) 90 (c) 0.09 (d) 9
  16. 16.What is the value of the digit 6 in 36.297? (a) 0.6 (b) 0.06 (c) 60 (d) 6
  17. 17.5.54 + 8.3 = ? (a) 13.94 (b) 13.74 (c) 13.84 (d) 6.37
  18. 18.Which is the greatest: 0.66, 0.6, 0.571, 0.095? (a) 0.66 (b) 0.6 (c) 0.571 (d) 0.095
  19. 19.What is the value of the digit 5 in 16.852? (a) 5 (b) 0.05 (c) 0.5 (d) 0.005
  20. 20.Which is the greatest: 0.38, 0.223, 0.3, 0.097? (a) 0.38 (b) 0.223 (c) 0.3 (d) 0.097
  21. 21.What is the value of the digit 1 in 18.495? (a) 1 (b) 0.01 (c) 0.1 (d) 10
  22. 22.1.16 + 4.8 = ? (a) 6.06 (b) 1.64 (c) 5.86 (d) 5.96
  23. 23.7.33 + 2.5 = ? (a) 9.83 (b) 9.93 (c) 9.73 (d) 7.58
  24. 24.2.08 + 5.9 = ? (a) 7.98 (b) 8.08 (c) 2.67 (d) 7.88
  25. 25.Which is the smallest: 0.6, 0.059, 0.66, 0.554? (a) 0.6 (b) 0.059 (c) 0.66 (d) 0.554
  26. 26.Which is the greatest: 0.021, 0.2, 0.126, 0.28? (a) 0.021 (b) 0.2 (c) 0.126 (d) 0.28
  27. 27.2.25 + 2.6 = ? (a) 2.51 (b) 4.75 (c) 4.95 (d) 4.85
  28. 28.3.48 + 7.2 = ? (a) 10.78 (b) 10.58 (c) 4.2 (d) 10.68
  29. 29.2.25 + 2.8 = ? (a) 5.15 (b) 2.53 (c) 4.95 (d) 5.05
  30. 30.Which is the smallest: 0.452, 0.59, 0.086, 0.5? (a) 0.452 (b) 0.59 (c) 0.086 (d) 0.5
  31. 31.Which is the greatest: 0.84, 0.062, 0.8, 0.757? (a) 0.84 (b) 0.062 (c) 0.8 (d) 0.757
  32. 32.What is the value of the digit 7 in 27.465? (a) 0.7 (b) 7 (c) 0.07 (d) 70
  33. 33.Which is the smallest: 0.6, 0.026, 0.539, 0.68? (a) 0.6 (b) 0.026 (c) 0.539 (d) 0.68
  34. 34.Which is the greatest: 0.199, 0.051, 0.28, 0.2? (a) 0.199 (b) 0.051 (c) 0.28 (d) 0.2
  35. 35.8.11 + 6.1 = ? (a) 8.72 (b) 14.31 (c) 14.21 (d) 14.11
  36. 36.What is the value of the digit 6 in 68.571? (a) 0.06 (b) 0.6 (c) 6 (d) 60
  37. 37.What is the value of the digit 7 in 21.387? (a) 0.007 (b) 0.07 (c) 7 (d) 0.7
  38. 38.What is the value of the digit 1 in 18.274? (a) 0.1 (b) 0.01 (c) 1 (d) 10
  39. 39.Which is the smallest: 0.067, 0.7, 0.694, 0.77? (a) 0.067 (b) 0.7 (c) 0.694 (d) 0.77
  40. 40.What is the value of the digit 6 in 81.269? (a) 0.6 (b) 6 (c) 0.06 (d) 0.006

Answer key

  1. 11.72
  2. 10.57
  3. 10.07
  4. 0.016
  5. 15.91
  6. 0.63
  7. 8.54
  8. 0.33
  9. 0.077
  10. 7
  11. 0.2
  12. 3.01
  13. 13.65
  14. 1
  15. 90
  16. 6
  17. 13.84
  18. 0.66
  19. 0.05
  20. 0.38
  21. 10
  22. 5.96
  23. 9.83
  24. 7.98
  25. 0.059
  26. 0.28
  27. 4.85
  28. 10.68
  29. 5.05
  30. 0.086
  31. 0.84
  32. 7
  33. 0.026
  34. 0.28
  35. 14.21
  36. 60
  37. 0.007
  38. 10
  39. 0.067
  40. 0.06

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