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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 162 · 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. 1.5.41 + 3.6 = ? (a) 5.77 (b) 9.11 (c) 9.01 (d) 8.91
  2. 2.8.41 + 9.5 = ? (a) 9.36 (b) 18.01 (c) 17.81 (d) 17.91
  3. 3.9.99 + 2.1 = ? (a) 12.19 (b) 11.99 (c) 12.09 (d) 10.2
  4. 4.Which is the greatest: 0.073, 0.722, 0.87, 0.8? (a) 0.073 (b) 0.722 (c) 0.87 (d) 0.8
  5. 5.Which is the greatest: 0.8, 0.051, 0.753, 0.86? (a) 0.8 (b) 0.051 (c) 0.753 (d) 0.86
  6. 6.2.92 + 5.8 = ? (a) 3.5 (b) 8.72 (c) 8.62 (d) 8.82
  7. 7.Which is the greatest: 0.371, 0.022, 0.4, 0.47? (a) 0.371 (b) 0.022 (c) 0.4 (d) 0.47
  8. 8.Which is the greatest: 0.25, 0.085, 0.2, 0.172? (a) 0.25 (b) 0.085 (c) 0.2 (d) 0.172
  9. 9.5.25 + 8.2 = ? (a) 13.35 (b) 13.55 (c) 6.07 (d) 13.45
  10. 10.What is the value of the digit 7 in 57.469? (a) 0.7 (b) 0.07 (c) 70 (d) 7
  11. 11.1.88 + 8.8 = ? (a) 10.68 (b) 10.78 (c) 2.76 (d) 10.58
  12. 12.8.35 + 3.6 = ? (a) 8.71 (b) 12.05 (c) 11.85 (d) 11.95
  13. 13.2.72 + 6.8 = ? (a) 9.62 (b) 9.52 (c) 3.4 (d) 9.42
  14. 14.9.71 + 8.7 = ? (a) 10.58 (b) 18.51 (c) 18.41 (d) 18.31
  15. 15.Which is the greatest: 0.077, 0.613, 0.7, 0.74? (a) 0.077 (b) 0.613 (c) 0.7 (d) 0.74
  16. 16.5.71 + 9.2 = ? (a) 14.91 (b) 15.01 (c) 14.81 (d) 6.63
  17. 17.Which is the smallest: 0.416, 0.56, 0.073, 0.5? (a) 0.416 (b) 0.56 (c) 0.073 (d) 0.5
  18. 18.What is the value of the digit 7 in 75.823? (a) 70 (b) 0.7 (c) 0.07 (d) 7
  19. 19.What is the value of the digit 5 in 36.457? (a) 0.5 (b) 5 (c) 0.05 (d) 0.005
  20. 20.What is the value of the digit 2 in 29.361? (a) 20 (b) 2 (c) 0.02 (d) 0.2
  21. 21.Which is the greatest: 0.049, 0.45, 0.338, 0.4? (a) 0.049 (b) 0.45 (c) 0.338 (d) 0.4
  22. 22.9.22 + 8.9 = ? (a) 18.02 (b) 10.11 (c) 18.22 (d) 18.12
  23. 23.Which is the smallest: 0.61, 0.577, 0.048, 0.6? (a) 0.61 (b) 0.577 (c) 0.048 (d) 0.6
  24. 24.5.01 + 5.7 = ? (a) 10.61 (b) 5.58 (c) 10.71 (d) 10.81
  25. 25.Which is the smallest: 0.272, 0.3, 0.31, 0.025? (a) 0.272 (b) 0.3 (c) 0.31 (d) 0.025
  26. 26.8.52 + 5.5 = ? (a) 14.02 (b) 14.12 (c) 13.92 (d) 9.07
  27. 27.6.83 + 2.9 = ? (a) 9.63 (b) 9.83 (c) 9.73 (d) 7.12
  28. 28.9.29 + 4.2 = ? (a) 13.49 (b) 9.71 (c) 13.59 (d) 13.39
  29. 29.Which is the greatest: 0.8, 0.037, 0.718, 0.86? (a) 0.8 (b) 0.037 (c) 0.718 (d) 0.86
  30. 30.6.58 + 8.8 = ? (a) 15.28 (b) 15.38 (c) 15.48 (d) 7.46
  31. 31.2.37 + 7.1 = ? (a) 9.37 (b) 9.57 (c) 9.47 (d) 3.08
  32. 32.What is the value of the digit 8 in 86.459? (a) 0.8 (b) 0.08 (c) 80 (d) 8
  33. 33.What is the value of the digit 9 in 19.523? (a) 0.9 (b) 0.09 (c) 9 (d) 90
  34. 34.8.16 + 5.2 = ? (a) 8.68 (b) 13.46 (c) 13.26 (d) 13.36
  35. 35.Which is the greatest: 0.68, 0.6, 0.061, 0.577? (a) 0.68 (b) 0.6 (c) 0.061 (d) 0.577
  36. 36.8.21 + 3.5 = ? (a) 8.56 (b) 11.81 (c) 11.71 (d) 11.61
  37. 37.Which is the smallest: 0.41, 0.015, 0.356, 0.4? (a) 0.41 (b) 0.015 (c) 0.356 (d) 0.4
  38. 38.Which is the greatest: 0.647, 0.019, 0.75, 0.7? (a) 0.647 (b) 0.019 (c) 0.75 (d) 0.7
  39. 39.What is the value of the digit 3 in 95.743? (a) 3 (b) 0.3 (c) 0.003 (d) 0.03
  40. 40.1.32 + 9.3 = ? (a) 2.25 (b) 10.62 (c) 10.72 (d) 10.52

Answer key

  1. 9.01
  2. 17.91
  3. 12.09
  4. 0.87
  5. 0.86
  6. 8.72
  7. 0.47
  8. 0.25
  9. 13.45
  10. 7
  11. 10.68
  12. 11.95
  13. 9.52
  14. 18.41
  15. 0.74
  16. 14.91
  17. 0.073
  18. 70
  19. 0.05
  20. 20
  21. 0.45
  22. 18.12
  23. 0.048
  24. 10.71
  25. 0.025
  26. 14.02
  27. 9.73
  28. 13.49
  29. 0.86
  30. 15.38
  31. 9.47
  32. 80
  33. 9
  34. 13.36
  35. 0.68
  36. 11.71
  37. 0.015
  38. 0.75
  39. 0.003
  40. 10.62

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