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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 511 · 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. 1.4.61 + 9.6 = ? (a) 14.31 (b) 14.21 (c) 14.11 (d) 5.57
  2. 2.What is the value of the digit 8 in 84.521? (a) 0.8 (b) 80 (c) 0.08 (d) 8
  3. 3.9.22 + 3.2 = ? (a) 12.32 (b) 12.52 (c) 12.42 (d) 9.54
  4. 4.What is the value of the digit 5 in 79.513? (a) 0.005 (b) 5 (c) 0.5 (d) 0.05
  5. 5.Which is the greatest: 0.72, 0.681, 0.7, 0.058? (a) 0.72 (b) 0.681 (c) 0.7 (d) 0.058
  6. 6.7.24 + 4.8 = ? (a) 11.94 (b) 7.72 (c) 12.04 (d) 12.14
  7. 7.What is the value of the digit 4 in 69.248? (a) 0.04 (b) 4 (c) 0.4 (d) 0.004
  8. 8.What is the value of the digit 7 in 61.974? (a) 0.07 (b) 0.007 (c) 7 (d) 0.7
  9. 9.What is the value of the digit 2 in 42.385? (a) 0.2 (b) 2 (c) 0.02 (d) 20
  10. 10.1.27 + 3.1 = ? (a) 4.27 (b) 1.58 (c) 4.47 (d) 4.37
  11. 11.Which is the greatest: 0.59, 0.041, 0.415, 0.5? (a) 0.59 (b) 0.041 (c) 0.415 (d) 0.5
  12. 12.Which is the smallest: 0.8, 0.87, 0.759, 0.047? (a) 0.8 (b) 0.87 (c) 0.759 (d) 0.047
  13. 13.What is the value of the digit 1 in 12.498? (a) 0.1 (b) 0.01 (c) 1 (d) 10
  14. 14.5.52 + 7.1 = ? (a) 12.52 (b) 6.23 (c) 12.62 (d) 12.72
  15. 15.What is the value of the digit 2 in 52.398? (a) 0.02 (b) 0.2 (c) 2 (d) 20
  16. 16.Which is the smallest: 0.4, 0.46, 0.067, 0.329? (a) 0.4 (b) 0.46 (c) 0.067 (d) 0.329
  17. 17.Which is the greatest: 0.012, 0.678, 0.7, 0.79? (a) 0.012 (b) 0.678 (c) 0.7 (d) 0.79
  18. 18.2.58 + 3.8 = ? (a) 6.48 (b) 2.96 (c) 6.38 (d) 6.28
  19. 19.Which is the smallest: 0.8, 0.081, 0.83, 0.732? (a) 0.8 (b) 0.081 (c) 0.83 (d) 0.732
  20. 20.Which is the smallest: 0.21, 0.192, 0.2, 0.066? (a) 0.21 (b) 0.192 (c) 0.2 (d) 0.066
  21. 21.7.32 + 4.9 = ? (a) 7.81 (b) 12.22 (c) 12.12 (d) 12.32
  22. 22.Which is the greatest: 0.66, 0.525, 0.6, 0.018? (a) 0.66 (b) 0.525 (c) 0.6 (d) 0.018
  23. 23.Which is the greatest: 0.021, 0.264, 0.3, 0.31? (a) 0.021 (b) 0.264 (c) 0.3 (d) 0.31
  24. 24.Which is the smallest: 0.023, 0.619, 0.77, 0.7? (a) 0.023 (b) 0.619 (c) 0.77 (d) 0.7
  25. 25.Which is the smallest: 0.67, 0.581, 0.052, 0.6? (a) 0.67 (b) 0.581 (c) 0.052 (d) 0.6
  26. 26.1.56 + 1.8 = ? (a) 3.26 (b) 1.74 (c) 3.36 (d) 3.46
  27. 27.3.34 + 9.3 = ? (a) 4.27 (b) 12.64 (c) 12.74 (d) 12.54
  28. 28.What is the value of the digit 4 in 74.239? (a) 0.04 (b) 40 (c) 0.4 (d) 4
  29. 29.9.63 + 3.1 = ? (a) 12.83 (b) 12.63 (c) 9.94 (d) 12.73
  30. 30.5.18 + 7.8 = ? (a) 13.08 (b) 12.98 (c) 12.88 (d) 5.96
  31. 31.2.52 + 3.3 = ? (a) 5.72 (b) 2.85 (c) 5.82 (d) 5.92
  32. 32.2.71 + 9.1 = ? (a) 11.91 (b) 3.62 (c) 11.81 (d) 11.71
  33. 33.Which is the smallest: 0.047, 0.25, 0.2, 0.125? (a) 0.047 (b) 0.25 (c) 0.2 (d) 0.125
  34. 34.Which is the greatest: 0.186, 0.022, 0.2, 0.28? (a) 0.186 (b) 0.022 (c) 0.2 (d) 0.28
  35. 35.Which is the smallest: 0.86, 0.8, 0.093, 0.733? (a) 0.86 (b) 0.8 (c) 0.093 (d) 0.733
  36. 36.6.97 + 3.1 = ? (a) 10.07 (b) 10.17 (c) 7.28 (d) 9.97
  37. 37.Which is the smallest: 0.018, 0.81, 0.8, 0.785? (a) 0.018 (b) 0.81 (c) 0.8 (d) 0.785
  38. 38.What is the value of the digit 6 in 45.296? (a) 6 (b) 0.06 (c) 0.006 (d) 0.6
  39. 39.1.54 + 9.9 = ? (a) 2.53 (b) 11.34 (c) 11.54 (d) 11.44
  40. 40.Which is the smallest: 0.684, 0.7, 0.041, 0.77? (a) 0.684 (b) 0.7 (c) 0.041 (d) 0.77

Answer key

  1. 14.21
  2. 80
  3. 12.42
  4. 0.5
  5. 0.72
  6. 12.04
  7. 0.04
  8. 0.07
  9. 2
  10. 4.37
  11. 0.59
  12. 0.047
  13. 10
  14. 12.62
  15. 2
  16. 0.067
  17. 0.79
  18. 6.38
  19. 0.081
  20. 0.066
  21. 12.22
  22. 0.66
  23. 0.31
  24. 0.023
  25. 0.052
  26. 3.36
  27. 12.64
  28. 4
  29. 12.73
  30. 12.98
  31. 5.82
  32. 11.81
  33. 0.047
  34. 0.28
  35. 0.093
  36. 10.07
  37. 0.018
  38. 0.006
  39. 11.44
  40. 0.041

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