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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 604 · 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.Which is the greatest: 0.399, 0.089, 0.4, 0.45? (a) 0.399 (b) 0.089 (c) 0.4 (d) 0.45
  2. 2.3.49 + 7.5 = ? (a) 10.99 (b) 10.89 (c) 4.24 (d) 11.09
  3. 3.6.76 + 5.9 = ? (a) 7.35 (b) 12.56 (c) 12.76 (d) 12.66
  4. 4.Which is the smallest: 0.618, 0.75, 0.079, 0.7? (a) 0.618 (b) 0.75 (c) 0.079 (d) 0.7
  5. 5.What is the value of the digit 9 in 69.741? (a) 9 (b) 0.9 (c) 90 (d) 0.09
  6. 6.6.91 + 2.1 = ? (a) 9.11 (b) 7.12 (c) 8.91 (d) 9.01
  7. 7.Which is the greatest: 0.477, 0.5, 0.086, 0.55? (a) 0.477 (b) 0.5 (c) 0.086 (d) 0.55
  8. 8.Which is the greatest: 0.5, 0.081, 0.51, 0.426? (a) 0.5 (b) 0.081 (c) 0.51 (d) 0.426
  9. 9.1.74 + 7.6 = ? (a) 9.24 (b) 2.5 (c) 9.44 (d) 9.34
  10. 10.8.22 + 5.6 = ? (a) 8.78 (b) 13.82 (c) 13.72 (d) 13.92
  11. 11.What is the value of the digit 8 in 43.781? (a) 0.008 (b) 0.8 (c) 0.08 (d) 8
  12. 12.What is the value of the digit 9 in 37.985? (a) 0.009 (b) 9 (c) 0.9 (d) 0.09
  13. 13.2.12 + 7.3 = ? (a) 9.32 (b) 2.85 (c) 9.52 (d) 9.42
  14. 14.2.95 + 7.7 = ? (a) 10.55 (b) 3.72 (c) 10.75 (d) 10.65
  15. 15.What is the value of the digit 2 in 63.241? (a) 2 (b) 0.2 (c) 0.02 (d) 0.002
  16. 16.4.36 + 6.5 = ? (a) 10.86 (b) 5.01 (c) 10.76 (d) 10.96
  17. 17.5.86 + 2.2 = ? (a) 7.96 (b) 6.08 (c) 8.06 (d) 8.16
  18. 18.What is the value of the digit 7 in 61.274? (a) 0.007 (b) 0.7 (c) 0.07 (d) 7
  19. 19.Which is the smallest: 0.38, 0.219, 0.075, 0.3? (a) 0.38 (b) 0.219 (c) 0.075 (d) 0.3
  20. 20.Which is the greatest: 0.3, 0.071, 0.295, 0.35? (a) 0.3 (b) 0.071 (c) 0.295 (d) 0.35
  21. 21.What is the value of the digit 7 in 61.732? (a) 0.007 (b) 0.7 (c) 7 (d) 0.07
  22. 22.2.32 + 1.7 = ? (a) 2.49 (b) 4.02 (c) 4.12 (d) 3.92
  23. 23.4.81 + 8.7 = ? (a) 13.41 (b) 13.61 (c) 13.51 (d) 5.68
  24. 24.Which is the greatest: 0.64, 0.588, 0.069, 0.6? (a) 0.64 (b) 0.588 (c) 0.069 (d) 0.6
  25. 25.What is the value of the digit 3 in 37.458? (a) 0.3 (b) 30 (c) 3 (d) 0.03
  26. 26.Which is the smallest: 0.448, 0.029, 0.53, 0.5? (a) 0.448 (b) 0.029 (c) 0.53 (d) 0.5
  27. 27.8.05 + 7.1 = ? (a) 15.15 (b) 8.76 (c) 15.05 (d) 15.25
  28. 28.8.82 + 8.3 = ? (a) 17.22 (b) 9.65 (c) 17.12 (d) 17.02
  29. 29.Which is the smallest: 0.259, 0.023, 0.31, 0.3? (a) 0.259 (b) 0.023 (c) 0.31 (d) 0.3
  30. 30.2.35 + 2.7 = ? (a) 5.15 (b) 2.62 (c) 5.05 (d) 4.95
  31. 31.What is the value of the digit 1 in 91.572? (a) 0.01 (b) 0.1 (c) 1 (d) 10
  32. 32.4.78 + 8.2 = ? (a) 5.6 (b) 12.98 (c) 12.88 (d) 13.08
  33. 33.Which is the greatest: 0.86, 0.035, 0.8, 0.732? (a) 0.86 (b) 0.035 (c) 0.8 (d) 0.732
  34. 34.4.62 + 4.8 = ? (a) 5.1 (b) 9.42 (c) 9.32 (d) 9.52
  35. 35.Which is the smallest: 0.031, 0.6, 0.61, 0.512? (a) 0.031 (b) 0.6 (c) 0.61 (d) 0.512
  36. 36.1.85 + 4.4 = ? (a) 6.15 (b) 6.25 (c) 2.29 (d) 6.35
  37. 37.9.76 + 4.8 = ? (a) 14.66 (b) 10.24 (c) 14.46 (d) 14.56
  38. 38.What is the value of the digit 1 in 93.512? (a) 0.001 (b) 1 (c) 0.01 (d) 0.1
  39. 39.Which is the smallest: 0.8, 0.81, 0.017, 0.717? (a) 0.8 (b) 0.81 (c) 0.017 (d) 0.717
  40. 40.Which is the greatest: 0.83, 0.099, 0.8, 0.769? (a) 0.83 (b) 0.099 (c) 0.8 (d) 0.769

Answer key

  1. 0.45
  2. 10.99
  3. 12.66
  4. 0.079
  5. 9
  6. 9.01
  7. 0.55
  8. 0.51
  9. 9.34
  10. 13.82
  11. 0.08
  12. 0.9
  13. 9.42
  14. 10.65
  15. 0.2
  16. 10.86
  17. 8.06
  18. 0.07
  19. 0.075
  20. 0.35
  21. 0.7
  22. 4.02
  23. 13.51
  24. 0.64
  25. 30
  26. 0.029
  27. 15.15
  28. 17.12
  29. 0.023
  30. 5.05
  31. 1
  32. 12.98
  33. 0.86
  34. 9.42
  35. 0.031
  36. 6.25
  37. 14.56
  38. 0.01
  39. 0.017
  40. 0.83

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