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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 250 · 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. 1.7.52 + 4.1 = ? (a) 7.93 (b) 11.52 (c) 11.72 (d) 11.62
  2. 2.2.16 + 5.3 = ? (a) 7.56 (b) 7.36 (c) 7.46 (d) 2.69
  3. 3.9.54 + 7.9 = ? (a) 17.34 (b) 17.54 (c) 17.44 (d) 10.33
  4. 4.2.45 + 3.2 = ? (a) 2.77 (b) 5.65 (c) 5.55 (d) 5.75
  5. 5.Which is the greatest: 0.28, 0.053, 0.166, 0.2? (a) 0.28 (b) 0.053 (c) 0.166 (d) 0.2
  6. 6.What is the value of the digit 9 in 96.523? (a) 0.09 (b) 9 (c) 0.9 (d) 90
  7. 7.Which is the greatest: 0.095, 0.251, 0.31, 0.3? (a) 0.095 (b) 0.251 (c) 0.31 (d) 0.3
  8. 8.What is the value of the digit 8 in 24.879? (a) 0.8 (b) 0.08 (c) 8 (d) 0.008
  9. 9.What is the value of the digit 3 in 18.376? (a) 0.3 (b) 0.003 (c) 3 (d) 0.03
  10. 10.Which is the greatest: 0.72, 0.654, 0.7, 0.053? (a) 0.72 (b) 0.654 (c) 0.7 (d) 0.053
  11. 11.3.25 + 5.6 = ? (a) 8.95 (b) 3.81 (c) 8.85 (d) 8.75
  12. 12.1.75 + 3.1 = ? (a) 2.06 (b) 4.95 (c) 4.85 (d) 4.75
  13. 13.1.24 + 7.6 = ? (a) 8.84 (b) 2 (c) 8.74 (d) 8.94
  14. 14.What is the value of the digit 1 in 12.589? (a) 10 (b) 1 (c) 0.01 (d) 0.1
  15. 15.What is the value of the digit 7 in 32.197? (a) 0.7 (b) 0.007 (c) 7 (d) 0.07
  16. 16.2.97 + 9.9 = ? (a) 12.87 (b) 3.96 (c) 12.77 (d) 12.97
  17. 17.Which is the greatest: 0.6, 0.054, 0.597, 0.61? (a) 0.6 (b) 0.054 (c) 0.597 (d) 0.61
  18. 18.6.51 + 3.5 = ? (a) 9.91 (b) 10.01 (c) 10.11 (d) 6.86
  19. 19.7.25 + 8.7 = ? (a) 8.12 (b) 16.05 (c) 15.85 (d) 15.95
  20. 20.What is the value of the digit 8 in 58.341? (a) 8 (b) 80 (c) 0.08 (d) 0.8
  21. 21.1.31 + 3.2 = ? (a) 1.63 (b) 4.51 (c) 4.41 (d) 4.61
  22. 22.What is the value of the digit 3 in 92.317? (a) 0.003 (b) 0.3 (c) 3 (d) 0.03
  23. 23.Which is the greatest: 0.028, 0.648, 0.79, 0.7? (a) 0.028 (b) 0.648 (c) 0.79 (d) 0.7
  24. 24.6.78 + 3.2 = ? (a) 10.08 (b) 7.1 (c) 9.98 (d) 9.88
  25. 25.7.28 + 6.7 = ? (a) 13.88 (b) 13.98 (c) 7.95 (d) 14.08
  26. 26.Which is the greatest: 0.58, 0.015, 0.497, 0.5? (a) 0.58 (b) 0.015 (c) 0.497 (d) 0.5
  27. 27.9.51 + 7.7 = ? (a) 17.11 (b) 10.28 (c) 17.31 (d) 17.21
  28. 28.Which is the smallest: 0.28, 0.037, 0.178, 0.2? (a) 0.28 (b) 0.037 (c) 0.178 (d) 0.2
  29. 29.Which is the smallest: 0.339, 0.49, 0.4, 0.096? (a) 0.339 (b) 0.49 (c) 0.4 (d) 0.096
  30. 30.What is the value of the digit 3 in 62.381? (a) 0.003 (b) 3 (c) 0.03 (d) 0.3
  31. 31.Which is the smallest: 0.85, 0.8, 0.083, 0.795? (a) 0.85 (b) 0.8 (c) 0.083 (d) 0.795
  32. 32.Which is the smallest: 0.84, 0.8, 0.768, 0.075? (a) 0.84 (b) 0.8 (c) 0.768 (d) 0.075
  33. 33.9.81 + 8.2 = ? (a) 10.63 (b) 18.11 (c) 18.01 (d) 17.91
  34. 34.What is the value of the digit 8 in 28.395? (a) 0.08 (b) 80 (c) 0.8 (d) 8
  35. 35.Which is the greatest: 0.045, 0.8, 0.733, 0.89? (a) 0.045 (b) 0.8 (c) 0.733 (d) 0.89
  36. 36.Which is the greatest: 0.21, 0.035, 0.144, 0.2? (a) 0.21 (b) 0.035 (c) 0.144 (d) 0.2
  37. 37.What is the value of the digit 7 in 38.729? (a) 0.07 (b) 0.7 (c) 0.007 (d) 7
  38. 38.What is the value of the digit 4 in 45.762? (a) 40 (b) 4 (c) 0.4 (d) 0.04
  39. 39.9.11 + 1.1 = ? (a) 10.21 (b) 9.22 (c) 10.31 (d) 10.11
  40. 40.5.39 + 6.9 = ? (a) 6.08 (b) 12.19 (c) 12.29 (d) 12.39

Answer key

  1. 11.62
  2. 7.46
  3. 17.44
  4. 5.65
  5. 0.28
  6. 90
  7. 0.31
  8. 0.8
  9. 0.3
  10. 0.72
  11. 8.85
  12. 4.85
  13. 8.84
  14. 10
  15. 0.007
  16. 12.87
  17. 0.61
  18. 10.01
  19. 15.95
  20. 8
  21. 4.51
  22. 0.3
  23. 0.79
  24. 9.98
  25. 13.98
  26. 0.58
  27. 17.21
  28. 0.037
  29. 0.096
  30. 0.3
  31. 0.083
  32. 0.075
  33. 18.01
  34. 8
  35. 0.89
  36. 0.21
  37. 0.7
  38. 40
  39. 10.21
  40. 12.29

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