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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 343 · 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. 1.5.24 + 7.4 = ? (a) 12.74 (b) 5.98 (c) 12.54 (d) 12.64
  2. 2.2.72 + 7.1 = ? (a) 3.43 (b) 9.72 (c) 9.82 (d) 9.92
  3. 3.Which is the greatest: 0.21, 0.194, 0.2, 0.091? (a) 0.21 (b) 0.194 (c) 0.2 (d) 0.091
  4. 4.5.75 + 3.2 = ? (a) 6.07 (b) 9.05 (c) 8.85 (d) 8.95
  5. 5.Which is the greatest: 0.53, 0.045, 0.431, 0.5? (a) 0.53 (b) 0.045 (c) 0.431 (d) 0.5
  6. 6.Which is the smallest: 0.29, 0.162, 0.051, 0.2? (a) 0.29 (b) 0.162 (c) 0.051 (d) 0.2
  7. 7.7.93 + 6.2 = ? (a) 14.03 (b) 8.55 (c) 14.13 (d) 14.23
  8. 8.Which is the greatest: 0.252, 0.37, 0.018, 0.3? (a) 0.252 (b) 0.37 (c) 0.018 (d) 0.3
  9. 9.Which is the greatest: 0.077, 0.643, 0.7, 0.77? (a) 0.077 (b) 0.643 (c) 0.7 (d) 0.77
  10. 10.6.04 + 8.1 = ? (a) 14.24 (b) 14.04 (c) 14.14 (d) 6.85
  11. 11.What is the value of the digit 2 in 53.482? (a) 0.02 (b) 0.2 (c) 2 (d) 0.002
  12. 12.What is the value of the digit 5 in 94.725? (a) 0.5 (b) 0.005 (c) 0.05 (d) 5
  13. 13.What is the value of the digit 2 in 12.956? (a) 20 (b) 2 (c) 0.02 (d) 0.2
  14. 14.Which is the smallest: 0.419, 0.51, 0.023, 0.5? (a) 0.419 (b) 0.51 (c) 0.023 (d) 0.5
  15. 15.What is the value of the digit 2 in 36.294? (a) 0.002 (b) 2 (c) 0.2 (d) 0.02
  16. 16.Which is the smallest: 0.333, 0.4, 0.41, 0.077? (a) 0.333 (b) 0.4 (c) 0.41 (d) 0.077
  17. 17.What is the value of the digit 7 in 78.936? (a) 70 (b) 0.07 (c) 7 (d) 0.7
  18. 18.5.91 + 3.9 = ? (a) 9.91 (b) 9.71 (c) 6.3 (d) 9.81
  19. 19.2.91 + 8.1 = ? (a) 11.01 (b) 3.72 (c) 10.91 (d) 11.11
  20. 20.What is the value of the digit 3 in 63.942? (a) 0.03 (b) 30 (c) 3 (d) 0.3
  21. 21.What is the value of the digit 1 in 18.356? (a) 10 (b) 0.01 (c) 0.1 (d) 1
  22. 22.What is the value of the digit 1 in 25.916? (a) 0.1 (b) 1 (c) 0.001 (d) 0.01
  23. 23.Which is the greatest: 0.012, 0.65, 0.6, 0.598? (a) 0.012 (b) 0.65 (c) 0.6 (d) 0.598
  24. 24.8.41 + 6.4 = ? (a) 14.91 (b) 14.71 (c) 14.81 (d) 9.05
  25. 25.7.51 + 8.8 = ? (a) 8.39 (b) 16.21 (c) 16.31 (d) 16.41
  26. 26.What is the value of the digit 3 in 51.293? (a) 0.03 (b) 0.3 (c) 3 (d) 0.003
  27. 27.What is the value of the digit 1 in 14.325? (a) 1 (b) 10 (c) 0.01 (d) 0.1
  28. 28.1.45 + 7.1 = ? (a) 8.55 (b) 8.65 (c) 8.45 (d) 2.16
  29. 29.2.45 + 8.1 = ? (a) 10.65 (b) 3.26 (c) 10.55 (d) 10.45
  30. 30.3.72 + 8.4 = ? (a) 4.56 (b) 12.22 (c) 12.02 (d) 12.12
  31. 31.What is the value of the digit 7 in 82.975? (a) 7 (b) 0.007 (c) 0.7 (d) 0.07
  32. 32.Which is the smallest: 0.664, 0.78, 0.7, 0.058? (a) 0.664 (b) 0.78 (c) 0.7 (d) 0.058
  33. 33.What is the value of the digit 3 in 23.958? (a) 30 (b) 0.03 (c) 0.3 (d) 3
  34. 34.5.02 + 2.7 = ? (a) 5.29 (b) 7.82 (c) 7.62 (d) 7.72
  35. 35.What is the value of the digit 1 in 17.539? (a) 0.01 (b) 10 (c) 1 (d) 0.1
  36. 36.4.97 + 2.4 = ? (a) 5.21 (b) 7.27 (c) 7.37 (d) 7.47
  37. 37.7.14 + 2.4 = ? (a) 9.44 (b) 9.54 (c) 7.38 (d) 9.64
  38. 38.3.85 + 6.6 = ? (a) 10.55 (b) 4.51 (c) 10.45 (d) 10.35
  39. 39.5.11 + 3.4 = ? (a) 8.41 (b) 8.51 (c) 5.45 (d) 8.61
  40. 40.5.63 + 3.2 = ? (a) 8.93 (b) 5.95 (c) 8.73 (d) 8.83

Answer key

  1. 12.64
  2. 9.82
  3. 0.21
  4. 8.95
  5. 0.53
  6. 0.051
  7. 14.13
  8. 0.37
  9. 0.77
  10. 14.14
  11. 0.002
  12. 0.005
  13. 2
  14. 0.023
  15. 0.2
  16. 0.077
  17. 70
  18. 9.81
  19. 11.01
  20. 3
  21. 10
  22. 0.01
  23. 0.65
  24. 14.81
  25. 16.31
  26. 0.003
  27. 10
  28. 8.55
  29. 10.55
  30. 12.12
  31. 0.07
  32. 0.058
  33. 3
  34. 7.72
  35. 10
  36. 7.37
  37. 9.54
  38. 10.45
  39. 8.51
  40. 8.83

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