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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 845 · 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. 1.6.64 + 9.1 = ? (a) 15.64 (b) 7.55 (c) 15.74 (d) 15.84
  2. 2.Which is the greatest: 0.073, 0.21, 0.157, 0.2? (a) 0.073 (b) 0.21 (c) 0.157 (d) 0.2
  3. 3.Which is the smallest: 0.043, 0.399, 0.4, 0.47? (a) 0.043 (b) 0.399 (c) 0.4 (d) 0.47
  4. 4.4.89 + 1.9 = ? (a) 6.79 (b) 6.69 (c) 6.89 (d) 5.08
  5. 5.What is the value of the digit 6 in 63.425? (a) 0.6 (b) 60 (c) 0.06 (d) 6
  6. 6.Which is the smallest: 0.7, 0.657, 0.71, 0.088? (a) 0.7 (b) 0.657 (c) 0.71 (d) 0.088
  7. 7.8.65 + 6.2 = ? (a) 9.27 (b) 14.95 (c) 14.85 (d) 14.75
  8. 8.5.72 + 3.6 = ? (a) 9.32 (b) 9.22 (c) 6.08 (d) 9.42
  9. 9.4.92 + 8.2 = ? (a) 13.02 (b) 13.12 (c) 13.22 (d) 5.74
  10. 10.5.12 + 4.6 = ? (a) 9.72 (b) 9.82 (c) 9.62 (d) 5.58
  11. 11.4.54 + 6.4 = ? (a) 5.18 (b) 11.04 (c) 10.94 (d) 10.84
  12. 12.2.35 + 1.6 = ? (a) 3.85 (b) 3.95 (c) 2.51 (d) 4.05
  13. 13.What is the value of the digit 3 in 42.368? (a) 0.003 (b) 3 (c) 0.03 (d) 0.3
  14. 14.What is the value of the digit 5 in 92.651? (a) 0.005 (b) 0.5 (c) 5 (d) 0.05
  15. 15.What is the value of the digit 3 in 26.317? (a) 0.03 (b) 3 (c) 0.3 (d) 0.003
  16. 16.What is the value of the digit 3 in 46.315? (a) 3 (b) 0.3 (c) 0.003 (d) 0.03
  17. 17.What is the value of the digit 9 in 95.324? (a) 0.9 (b) 9 (c) 90 (d) 0.09
  18. 18.What is the value of the digit 9 in 41.928? (a) 9 (b) 0.09 (c) 0.9 (d) 0.009
  19. 19.1.83 + 5.9 = ? (a) 7.83 (b) 7.73 (c) 2.42 (d) 7.63
  20. 20.2.61 + 3.6 = ? (a) 2.97 (b) 6.31 (c) 6.11 (d) 6.21
  21. 21.Which is the greatest: 0.6, 0.67, 0.046, 0.524? (a) 0.6 (b) 0.67 (c) 0.046 (d) 0.524
  22. 22.What is the value of the digit 3 in 83.671? (a) 3 (b) 0.03 (c) 30 (d) 0.3
  23. 23.Which is the smallest: 0.44, 0.4, 0.034, 0.325? (a) 0.44 (b) 0.4 (c) 0.034 (d) 0.325
  24. 24.7.71 + 3.8 = ? (a) 11.41 (b) 8.09 (c) 11.51 (d) 11.61
  25. 25.4.91 + 5.9 = ? (a) 10.71 (b) 10.81 (c) 10.91 (d) 5.5
  26. 26.Which is the greatest: 0.534, 0.6, 0.69, 0.038? (a) 0.534 (b) 0.6 (c) 0.69 (d) 0.038
  27. 27.Which is the greatest: 0.011, 0.426, 0.53, 0.5? (a) 0.011 (b) 0.426 (c) 0.53 (d) 0.5
  28. 28.4.24 + 8.8 = ? (a) 12.94 (b) 13.04 (c) 13.14 (d) 5.12
  29. 29.Which is the smallest: 0.224, 0.35, 0.064, 0.3? (a) 0.224 (b) 0.35 (c) 0.064 (d) 0.3
  30. 30.What is the value of the digit 7 in 27.841? (a) 7 (b) 70 (c) 0.07 (d) 0.7
  31. 31.Which is the smallest: 0.176, 0.081, 0.2, 0.22? (a) 0.176 (b) 0.081 (c) 0.2 (d) 0.22
  32. 32.Which is the greatest: 0.7, 0.082, 0.73, 0.648? (a) 0.7 (b) 0.082 (c) 0.73 (d) 0.648
  33. 33.Which is the smallest: 0.59, 0.5, 0.432, 0.056? (a) 0.59 (b) 0.5 (c) 0.432 (d) 0.056
  34. 34.What is the value of the digit 9 in 68.924? (a) 9 (b) 0.09 (c) 0.9 (d) 0.009
  35. 35.1.49 + 3.6 = ? (a) 1.85 (b) 4.99 (c) 5.09 (d) 5.19
  36. 36.Which is the greatest: 0.652, 0.096, 0.7, 0.73? (a) 0.652 (b) 0.096 (c) 0.7 (d) 0.73
  37. 37.What is the value of the digit 5 in 58.296? (a) 50 (b) 0.5 (c) 5 (d) 0.05
  38. 38.What is the value of the digit 5 in 37.851? (a) 0.005 (b) 0.05 (c) 5 (d) 0.5
  39. 39.4.91 + 3.7 = ? (a) 8.51 (b) 8.71 (c) 5.28 (d) 8.61
  40. 40.What is the value of the digit 2 in 28.637? (a) 0.02 (b) 0.2 (c) 2 (d) 20

Answer key

  1. 15.74
  2. 0.21
  3. 0.043
  4. 6.79
  5. 60
  6. 0.088
  7. 14.85
  8. 9.32
  9. 13.12
  10. 9.72
  11. 10.94
  12. 3.95
  13. 0.3
  14. 0.05
  15. 0.3
  16. 0.3
  17. 90
  18. 0.9
  19. 7.73
  20. 6.21
  21. 0.67
  22. 3
  23. 0.034
  24. 11.51
  25. 10.81
  26. 0.69
  27. 0.53
  28. 13.04
  29. 0.064
  30. 7
  31. 0.081
  32. 0.73
  33. 0.056
  34. 0.9
  35. 5.09
  36. 0.73
  37. 50
  38. 0.05
  39. 8.61
  40. 20

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