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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 821 · 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. 1.5.32 + 4.8 = ? (a) 5.8 (b) 10.02 (c) 10.12 (d) 10.22
  2. 2.6.53 + 9.2 = ? (a) 15.73 (b) 7.45 (c) 15.63 (d) 15.83
  3. 3.8.22 + 4.1 = ? (a) 12.42 (b) 8.63 (c) 12.32 (d) 12.22
  4. 4.Which is the greatest: 0.25, 0.052, 0.2, 0.144? (a) 0.25 (b) 0.052 (c) 0.2 (d) 0.144
  5. 5.7.72 + 1.5 = ? (a) 9.32 (b) 9.22 (c) 9.12 (d) 7.87
  6. 6.1.08 + 3.3 = ? (a) 4.48 (b) 4.28 (c) 4.38 (d) 1.41
  7. 7.Which is the greatest: 0.85, 0.741, 0.069, 0.8? (a) 0.85 (b) 0.741 (c) 0.069 (d) 0.8
  8. 8.Which is the greatest: 0.339, 0.4, 0.081, 0.42? (a) 0.339 (b) 0.4 (c) 0.081 (d) 0.42
  9. 9.2.78 + 5.5 = ? (a) 3.33 (b) 8.18 (c) 8.38 (d) 8.28
  10. 10.What is the value of the digit 7 in 86.794? (a) 7 (b) 0.7 (c) 0.07 (d) 0.007
  11. 11.8.75 + 2.6 = ? (a) 11.45 (b) 11.25 (c) 9.01 (d) 11.35
  12. 12.7.47 + 5.8 = ? (a) 13.17 (b) 13.27 (c) 8.05 (d) 13.37
  13. 13.What is the value of the digit 7 in 71.385? (a) 0.07 (b) 0.7 (c) 7 (d) 70
  14. 14.9.32 + 7.9 = ? (a) 17.32 (b) 17.12 (c) 10.11 (d) 17.22
  15. 15.2.28 + 8.8 = ? (a) 11.18 (b) 3.16 (c) 10.98 (d) 11.08
  16. 16.What is the value of the digit 6 in 16.327? (a) 6 (b) 60 (c) 0.06 (d) 0.6
  17. 17.What is the value of the digit 9 in 46.935? (a) 0.9 (b) 0.009 (c) 9 (d) 0.09
  18. 18.3.78 + 9.2 = ? (a) 13.08 (b) 4.7 (c) 12.88 (d) 12.98
  19. 19.Which is the smallest: 0.088, 0.629, 0.7, 0.75? (a) 0.088 (b) 0.629 (c) 0.7 (d) 0.75
  20. 20.3.01 + 7.1 = ? (a) 10.01 (b) 10.11 (c) 10.21 (d) 3.72
  21. 21.Which is the smallest: 0.43, 0.4, 0.078, 0.382? (a) 0.43 (b) 0.4 (c) 0.078 (d) 0.382
  22. 22.3.99 + 6.7 = ? (a) 10.79 (b) 10.59 (c) 4.66 (d) 10.69
  23. 23.Which is the greatest: 0.637, 0.71, 0.7, 0.022? (a) 0.637 (b) 0.71 (c) 0.7 (d) 0.022
  24. 24.1.83 + 2.1 = ? (a) 2.04 (b) 4.03 (c) 3.83 (d) 3.93
  25. 25.What is the value of the digit 2 in 62.174? (a) 2 (b) 0.2 (c) 0.02 (d) 20
  26. 26.Which is the greatest: 0.013, 0.8, 0.88, 0.741? (a) 0.013 (b) 0.8 (c) 0.88 (d) 0.741
  27. 27.5.07 + 7.6 = ? (a) 5.83 (b) 12.57 (c) 12.67 (d) 12.77
  28. 28.Which is the smallest: 0.79, 0.7, 0.663, 0.015? (a) 0.79 (b) 0.7 (c) 0.663 (d) 0.015
  29. 29.4.42 + 1.1 = ? (a) 5.62 (b) 5.42 (c) 4.53 (d) 5.52
  30. 30.3.51 + 9.7 = ? (a) 13.11 (b) 4.48 (c) 13.21 (d) 13.31
  31. 31.What is the value of the digit 5 in 97.135? (a) 0.005 (b) 0.5 (c) 0.05 (d) 5
  32. 32.9.88 + 5.4 = ? (a) 15.38 (b) 10.42 (c) 15.18 (d) 15.28
  33. 33.What is the value of the digit 7 in 19.567? (a) 0.7 (b) 7 (c) 0.007 (d) 0.07
  34. 34.Which is the smallest: 0.6, 0.62, 0.026, 0.559? (a) 0.6 (b) 0.62 (c) 0.026 (d) 0.559
  35. 35.2.81 + 3.2 = ? (a) 6.01 (b) 5.91 (c) 6.11 (d) 3.13
  36. 36.What is the value of the digit 6 in 26.945? (a) 0.6 (b) 60 (c) 6 (d) 0.06
  37. 37.Which is the smallest: 0.89, 0.8, 0.013, 0.743? (a) 0.89 (b) 0.8 (c) 0.013 (d) 0.743
  38. 38.Which is the greatest: 0.524, 0.6, 0.61, 0.068? (a) 0.524 (b) 0.6 (c) 0.61 (d) 0.068
  39. 39.9.16 + 6.1 = ? (a) 15.26 (b) 15.16 (c) 9.77 (d) 15.36
  40. 40.What is the value of the digit 2 in 13.892? (a) 0.002 (b) 0.2 (c) 0.02 (d) 2

Answer key

  1. 10.12
  2. 15.73
  3. 12.32
  4. 0.25
  5. 9.22
  6. 4.38
  7. 0.85
  8. 0.42
  9. 8.28
  10. 0.7
  11. 11.35
  12. 13.27
  13. 70
  14. 17.22
  15. 11.08
  16. 6
  17. 0.9
  18. 12.98
  19. 0.088
  20. 10.11
  21. 0.078
  22. 10.69
  23. 0.71
  24. 3.93
  25. 2
  26. 0.88
  27. 12.67
  28. 0.015
  29. 5.52
  30. 13.21
  31. 0.005
  32. 15.28
  33. 0.007
  34. 0.026
  35. 6.01
  36. 6
  37. 0.013
  38. 0.61
  39. 15.26
  40. 0.002

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