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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 486 · 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. 1.7.86 + 1.8 = ? (a) 8.04 (b) 9.56 (c) 9.66 (d) 9.76
  2. 2.Which is the greatest: 0.445, 0.064, 0.58, 0.5? (a) 0.445 (b) 0.064 (c) 0.58 (d) 0.5
  3. 3.1.96 + 9.5 = ? (a) 11.46 (b) 11.36 (c) 2.91 (d) 11.56
  4. 4.7.27 + 5.5 = ? (a) 12.87 (b) 12.77 (c) 7.82 (d) 12.67
  5. 5.Which is the smallest: 0.213, 0.36, 0.085, 0.3? (a) 0.213 (b) 0.36 (c) 0.085 (d) 0.3
  6. 6.Which is the greatest: 0.017, 0.535, 0.6, 0.68? (a) 0.017 (b) 0.535 (c) 0.6 (d) 0.68
  7. 7.What is the value of the digit 5 in 69.523? (a) 0.5 (b) 0.005 (c) 5 (d) 0.05
  8. 8.Which is the smallest: 0.75, 0.7, 0.642, 0.074? (a) 0.75 (b) 0.7 (c) 0.642 (d) 0.074
  9. 9.2.91 + 7.4 = ? (a) 10.41 (b) 3.65 (c) 10.31 (d) 10.21
  10. 10.What is the value of the digit 1 in 74.169? (a) 1 (b) 0.01 (c) 0.001 (d) 0.1
  11. 11.What is the value of the digit 9 in 98.143? (a) 9 (b) 0.09 (c) 0.9 (d) 90
  12. 12.Which is the greatest: 0.034, 0.82, 0.8, 0.771? (a) 0.034 (b) 0.82 (c) 0.8 (d) 0.771
  13. 13.Which is the smallest: 0.073, 0.45, 0.323, 0.4? (a) 0.073 (b) 0.45 (c) 0.323 (d) 0.4
  14. 14.1.36 + 3.2 = ? (a) 4.66 (b) 4.56 (c) 1.68 (d) 4.46
  15. 15.What is the value of the digit 2 in 83.274? (a) 0.02 (b) 0.002 (c) 0.2 (d) 2
  16. 16.What is the value of the digit 3 in 94.237? (a) 0.03 (b) 0.003 (c) 3 (d) 0.3
  17. 17.6.69 + 4.1 = ? (a) 10.89 (b) 10.79 (c) 7.1 (d) 10.69
  18. 18.Which is the greatest: 0.8, 0.025, 0.721, 0.87? (a) 0.8 (b) 0.025 (c) 0.721 (d) 0.87
  19. 19.8.62 + 3.1 = ? (a) 11.72 (b) 8.93 (c) 11.62 (d) 11.82
  20. 20.What is the value of the digit 1 in 13.284? (a) 1 (b) 10 (c) 0.1 (d) 0.01
  21. 21.What is the value of the digit 4 in 31.624? (a) 0.04 (b) 0.4 (c) 4 (d) 0.004
  22. 22.What is the value of the digit 8 in 91.782? (a) 0.8 (b) 8 (c) 0.008 (d) 0.08
  23. 23.Which is the smallest: 0.22, 0.192, 0.083, 0.2? (a) 0.22 (b) 0.192 (c) 0.083 (d) 0.2
  24. 24.9.31 + 4.9 = ? (a) 14.11 (b) 14.31 (c) 14.21 (d) 9.8
  25. 25.Which is the greatest: 0.89, 0.8, 0.072, 0.753? (a) 0.89 (b) 0.8 (c) 0.072 (d) 0.753
  26. 26.3.36 + 8.2 = ? (a) 4.18 (b) 11.66 (c) 11.46 (d) 11.56
  27. 27.5.69 + 9.6 = ? (a) 15.39 (b) 15.19 (c) 6.65 (d) 15.29
  28. 28.What is the value of the digit 4 in 74.629? (a) 0.04 (b) 40 (c) 0.4 (d) 4
  29. 29.7.98 + 5.5 = ? (a) 13.58 (b) 13.38 (c) 8.53 (d) 13.48
  30. 30.What is the value of the digit 8 in 79.681? (a) 8 (b) 0.8 (c) 0.08 (d) 0.008
  31. 31.Which is the smallest: 0.76, 0.627, 0.7, 0.064? (a) 0.76 (b) 0.627 (c) 0.7 (d) 0.064
  32. 32.What is the value of the digit 4 in 36.498? (a) 0.4 (b) 0.004 (c) 0.04 (d) 4
  33. 33.8.84 + 7.4 = ? (a) 9.58 (b) 16.14 (c) 16.34 (d) 16.24
  34. 34.What is the value of the digit 5 in 59.842? (a) 0.05 (b) 50 (c) 0.5 (d) 5
  35. 35.What is the value of the digit 2 in 35.142? (a) 0.2 (b) 2 (c) 0.02 (d) 0.002
  36. 36.Which is the smallest: 0.726, 0.8, 0.079, 0.82? (a) 0.726 (b) 0.8 (c) 0.079 (d) 0.82
  37. 37.4.52 + 1.7 = ? (a) 6.12 (b) 6.22 (c) 4.69 (d) 6.32
  38. 38.What is the value of the digit 9 in 36.159? (a) 0.009 (b) 0.9 (c) 9 (d) 0.09
  39. 39.What is the value of the digit 8 in 49.851? (a) 8 (b) 0.008 (c) 0.08 (d) 0.8
  40. 40.What is the value of the digit 9 in 93.147? (a) 0.9 (b) 9 (c) 0.09 (d) 90

Answer key

  1. 9.66
  2. 0.58
  3. 11.46
  4. 12.77
  5. 0.085
  6. 0.68
  7. 0.5
  8. 0.074
  9. 10.31
  10. 0.1
  11. 90
  12. 0.82
  13. 0.073
  14. 4.56
  15. 0.2
  16. 0.03
  17. 10.79
  18. 0.87
  19. 11.72
  20. 10
  21. 0.004
  22. 0.08
  23. 0.083
  24. 14.21
  25. 0.89
  26. 11.56
  27. 15.29
  28. 4
  29. 13.48
  30. 0.08
  31. 0.064
  32. 0.4
  33. 16.24
  34. 50
  35. 0.002
  36. 0.079
  37. 6.22
  38. 0.009
  39. 0.8
  40. 90

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