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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 672 · 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. 1.6.31 + 1.6 = ? (a) 7.81 (b) 7.91 (c) 6.47 (d) 8.01
  2. 2.7.01 + 3.3 = ? (a) 10.31 (b) 10.21 (c) 10.41 (d) 7.34
  3. 3.Which is the greatest: 0.36, 0.3, 0.082, 0.259? (a) 0.36 (b) 0.3 (c) 0.082 (d) 0.259
  4. 4.2.11 + 8.2 = ? (a) 2.93 (b) 10.21 (c) 10.41 (d) 10.31
  5. 5.4.79 + 2.1 = ? (a) 6.99 (b) 6.79 (c) 6.89 (d) 5
  6. 6.Which is the greatest: 0.39, 0.034, 0.251, 0.3? (a) 0.39 (b) 0.034 (c) 0.251 (d) 0.3
  7. 7.What is the value of the digit 4 in 42.935? (a) 4 (b) 40 (c) 0.04 (d) 0.4
  8. 8.2.96 + 4.7 = ? (a) 7.76 (b) 7.56 (c) 7.66 (d) 3.43
  9. 9.5.97 + 1.9 = ? (a) 7.97 (b) 7.87 (c) 6.16 (d) 7.77
  10. 10.1.08 + 2.2 = ? (a) 3.18 (b) 3.38 (c) 1.3 (d) 3.28
  11. 11.9.27 + 7.5 = ? (a) 16.87 (b) 16.77 (c) 10.02 (d) 16.67
  12. 12.7.65 + 3.6 = ? (a) 11.35 (b) 11.25 (c) 11.15 (d) 8.01
  13. 13.Which is the smallest: 0.86, 0.064, 0.738, 0.8? (a) 0.86 (b) 0.064 (c) 0.738 (d) 0.8
  14. 14.Which is the smallest: 0.63, 0.547, 0.6, 0.034? (a) 0.63 (b) 0.547 (c) 0.6 (d) 0.034
  15. 15.What is the value of the digit 2 in 94.521? (a) 2 (b) 0.2 (c) 0.002 (d) 0.02
  16. 16.What is the value of the digit 4 in 47.165? (a) 0.4 (b) 4 (c) 0.04 (d) 40
  17. 17.4.95 + 4.4 = ? (a) 5.39 (b) 9.45 (c) 9.35 (d) 9.25
  18. 18.Which is the smallest: 0.065, 0.126, 0.21, 0.2? (a) 0.065 (b) 0.126 (c) 0.21 (d) 0.2
  19. 19.2.45 + 4.1 = ? (a) 6.55 (b) 6.65 (c) 2.86 (d) 6.45
  20. 20.6.62 + 5.8 = ? (a) 12.52 (b) 12.32 (c) 12.42 (d) 7.2
  21. 21.Which is the greatest: 0.6, 0.527, 0.085, 0.62? (a) 0.6 (b) 0.527 (c) 0.085 (d) 0.62
  22. 22.2.79 + 4.3 = ? (a) 7.19 (b) 7.09 (c) 3.22 (d) 6.99
  23. 23.5.47 + 2.1 = ? (a) 7.57 (b) 5.68 (c) 7.67 (d) 7.47
  24. 24.What is the value of the digit 6 in 56.432? (a) 0.6 (b) 6 (c) 60 (d) 0.06
  25. 25.Which is the smallest: 0.026, 0.87, 0.735, 0.8? (a) 0.026 (b) 0.87 (c) 0.735 (d) 0.8
  26. 26.Which is the greatest: 0.141, 0.088, 0.2, 0.25? (a) 0.141 (b) 0.088 (c) 0.2 (d) 0.25
  27. 27.2.55 + 7.6 = ? (a) 10.05 (b) 3.31 (c) 10.15 (d) 10.25
  28. 28.What is the value of the digit 2 in 27.546? (a) 0.2 (b) 0.02 (c) 2 (d) 20
  29. 29.What is the value of the digit 1 in 16.254? (a) 0.1 (b) 0.01 (c) 1 (d) 10
  30. 30.What is the value of the digit 6 in 12.639? (a) 0.6 (b) 6 (c) 0.006 (d) 0.06
  31. 31.6.39 + 3.2 = ? (a) 6.71 (b) 9.69 (c) 9.59 (d) 9.49
  32. 32.Which is the smallest: 0.677, 0.7, 0.017, 0.74? (a) 0.677 (b) 0.7 (c) 0.017 (d) 0.74
  33. 33.5.75 + 7.8 = ? (a) 13.65 (b) 13.55 (c) 13.45 (d) 6.53
  34. 34.Which is the greatest: 0.299, 0.32, 0.3, 0.062? (a) 0.299 (b) 0.32 (c) 0.3 (d) 0.062
  35. 35.2.13 + 2.1 = ? (a) 4.13 (b) 4.33 (c) 4.23 (d) 2.34
  36. 36.4.51 + 2.2 = ? (a) 4.73 (b) 6.81 (c) 6.61 (d) 6.71
  37. 37.3.67 + 7.5 = ? (a) 4.42 (b) 11.17 (c) 11.27 (d) 11.07
  38. 38.Which is the smallest: 0.8, 0.055, 0.795, 0.83? (a) 0.8 (b) 0.055 (c) 0.795 (d) 0.83
  39. 39.Which is the greatest: 0.014, 0.6, 0.538, 0.69? (a) 0.014 (b) 0.6 (c) 0.538 (d) 0.69
  40. 40.4.79 + 4.9 = ? (a) 9.69 (b) 5.28 (c) 9.59 (d) 9.79

Answer key

  1. 7.91
  2. 10.31
  3. 0.36
  4. 10.31
  5. 6.89
  6. 0.39
  7. 40
  8. 7.66
  9. 7.87
  10. 3.28
  11. 16.77
  12. 11.25
  13. 0.064
  14. 0.034
  15. 0.02
  16. 40
  17. 9.35
  18. 0.065
  19. 6.55
  20. 12.42
  21. 0.62
  22. 7.09
  23. 7.57
  24. 6
  25. 0.026
  26. 0.25
  27. 10.15
  28. 20
  29. 10
  30. 0.6
  31. 9.59
  32. 0.017
  33. 13.55
  34. 0.32
  35. 4.23
  36. 6.71
  37. 11.17
  38. 0.055
  39. 0.69
  40. 9.69

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