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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 730 · 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. 1.6.91 + 9.6 = ? (a) 16.61 (b) 16.51 (c) 7.87 (d) 16.41
  2. 2.1.75 + 9.1 = ? (a) 10.95 (b) 10.75 (c) 10.85 (d) 2.66
  3. 3.6.81 + 9.8 = ? (a) 16.71 (b) 16.61 (c) 7.79 (d) 16.51
  4. 4.Which is the greatest: 0.336, 0.41, 0.018, 0.4? (a) 0.336 (b) 0.41 (c) 0.018 (d) 0.4
  5. 5.7.94 + 9.3 = ? (a) 17.34 (b) 17.14 (c) 17.24 (d) 8.87
  6. 6.What is the value of the digit 4 in 64.537? (a) 4 (b) 0.4 (c) 0.04 (d) 40
  7. 7.4.48 + 3.2 = ? (a) 7.78 (b) 7.58 (c) 7.68 (d) 4.8
  8. 8.Which is the greatest: 0.265, 0.026, 0.35, 0.3? (a) 0.265 (b) 0.026 (c) 0.35 (d) 0.3
  9. 9.What is the value of the digit 6 in 19.462? (a) 0.6 (b) 0.006 (c) 6 (d) 0.06
  10. 10.3.24 + 3.6 = ? (a) 3.6 (b) 6.94 (c) 6.74 (d) 6.84
  11. 11.9.79 + 1.6 = ? (a) 11.49 (b) 11.39 (c) 11.29 (d) 9.95
  12. 12.1.95 + 2.9 = ? (a) 4.85 (b) 4.95 (c) 2.24 (d) 4.75
  13. 13.Which is the smallest: 0.116, 0.064, 0.2, 0.21? (a) 0.116 (b) 0.064 (c) 0.2 (d) 0.21
  14. 14.Which is the smallest: 0.538, 0.63, 0.6, 0.023? (a) 0.538 (b) 0.63 (c) 0.6 (d) 0.023
  15. 15.What is the value of the digit 2 in 43.928? (a) 0.02 (b) 0.002 (c) 2 (d) 0.2
  16. 16.1.12 + 6.9 = ? (a) 7.92 (b) 8.12 (c) 1.81 (d) 8.02
  17. 17.Which is the smallest: 0.4, 0.331, 0.039, 0.45? (a) 0.4 (b) 0.331 (c) 0.039 (d) 0.45
  18. 18.Which is the smallest: 0.61, 0.6, 0.058, 0.545? (a) 0.61 (b) 0.6 (c) 0.058 (d) 0.545
  19. 19.Which is the greatest: 0.8, 0.762, 0.87, 0.063? (a) 0.8 (b) 0.762 (c) 0.87 (d) 0.063
  20. 20.8.29 + 5.4 = ? (a) 13.79 (b) 13.59 (c) 13.69 (d) 8.83
  21. 21.Which is the greatest: 0.2, 0.061, 0.133, 0.21? (a) 0.2 (b) 0.061 (c) 0.133 (d) 0.21
  22. 22.What is the value of the digit 8 in 82.653? (a) 80 (b) 0.08 (c) 0.8 (d) 8
  23. 23.7.58 + 4.1 = ? (a) 11.68 (b) 11.78 (c) 7.99 (d) 11.58
  24. 24.Which is the greatest: 0.012, 0.3, 0.36, 0.235? (a) 0.012 (b) 0.3 (c) 0.36 (d) 0.235
  25. 25.Which is the greatest: 0.31, 0.075, 0.249, 0.3? (a) 0.31 (b) 0.075 (c) 0.249 (d) 0.3
  26. 26.4.94 + 9.9 = ? (a) 14.94 (b) 14.84 (c) 5.93 (d) 14.74
  27. 27.5.08 + 3.8 = ? (a) 8.78 (b) 8.88 (c) 5.46 (d) 8.98
  28. 28.Which is the smallest: 0.3, 0.066, 0.268, 0.32? (a) 0.3 (b) 0.066 (c) 0.268 (d) 0.32
  29. 29.Which is the greatest: 0.667, 0.033, 0.7, 0.76? (a) 0.667 (b) 0.033 (c) 0.7 (d) 0.76
  30. 30.Which is the greatest: 0.321, 0.083, 0.4, 0.44? (a) 0.321 (b) 0.083 (c) 0.4 (d) 0.44
  31. 31.What is the value of the digit 9 in 89.173? (a) 0.09 (b) 0.9 (c) 90 (d) 9
  32. 32.6.54 + 6.1 = ? (a) 7.15 (b) 12.74 (c) 12.54 (d) 12.64
  33. 33.What is the value of the digit 2 in 72.145? (a) 0.02 (b) 0.2 (c) 2 (d) 20
  34. 34.Which is the greatest: 0.136, 0.071, 0.25, 0.2? (a) 0.136 (b) 0.071 (c) 0.25 (d) 0.2
  35. 35.Which is the greatest: 0.76, 0.042, 0.652, 0.7? (a) 0.76 (b) 0.042 (c) 0.652 (d) 0.7
  36. 36.What is the value of the digit 4 in 24.816? (a) 4 (b) 0.4 (c) 40 (d) 0.04
  37. 37.Which is the greatest: 0.7, 0.067, 0.78, 0.681? (a) 0.7 (b) 0.067 (c) 0.78 (d) 0.681
  38. 38.5.87 + 4.3 = ? (a) 10.07 (b) 6.3 (c) 10.27 (d) 10.17
  39. 39.What is the value of the digit 9 in 78.962? (a) 9 (b) 0.009 (c) 0.9 (d) 0.09
  40. 40.What is the value of the digit 3 in 59.362? (a) 0.03 (b) 0.3 (c) 0.003 (d) 3

Answer key

  1. 16.51
  2. 10.85
  3. 16.61
  4. 0.41
  5. 17.24
  6. 4
  7. 7.68
  8. 0.35
  9. 0.06
  10. 6.84
  11. 11.39
  12. 4.85
  13. 0.064
  14. 0.023
  15. 0.02
  16. 8.02
  17. 0.039
  18. 0.058
  19. 0.87
  20. 13.69
  21. 0.21
  22. 80
  23. 11.68
  24. 0.36
  25. 0.31
  26. 14.84
  27. 8.88
  28. 0.066
  29. 0.76
  30. 0.44
  31. 9
  32. 12.64
  33. 2
  34. 0.25
  35. 0.76
  36. 4
  37. 0.78
  38. 10.17
  39. 0.9
  40. 0.3

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