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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 41 · 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. 1.8.99 + 7.8 = ? (a) 9.77 (b) 16.69 (c) 16.79 (d) 16.89
  2. 2.What is the value of the digit 1 in 41.735? (a) 10 (b) 0.01 (c) 0.1 (d) 1
  3. 3.Which is the smallest: 0.143, 0.22, 0.021, 0.2? (a) 0.143 (b) 0.22 (c) 0.021 (d) 0.2
  4. 4.What is the value of the digit 2 in 82.317? (a) 0.02 (b) 20 (c) 0.2 (d) 2
  5. 5.Which is the smallest: 0.2, 0.168, 0.27, 0.025? (a) 0.2 (b) 0.168 (c) 0.27 (d) 0.025
  6. 6.5.64 + 6.6 = ? (a) 12.24 (b) 12.14 (c) 6.3 (d) 12.34
  7. 7.What is the value of the digit 1 in 51.694? (a) 1 (b) 0.1 (c) 0.01 (d) 10
  8. 8.What is the value of the digit 8 in 61.892? (a) 0.8 (b) 0.08 (c) 8 (d) 0.008
  9. 9.1.33 + 1.1 = ? (a) 2.53 (b) 2.43 (c) 2.33 (d) 1.44
  10. 10.Which is the greatest: 0.6, 0.519, 0.018, 0.61? (a) 0.6 (b) 0.519 (c) 0.018 (d) 0.61
  11. 11.Which is the greatest: 0.51, 0.5, 0.013, 0.419? (a) 0.51 (b) 0.5 (c) 0.013 (d) 0.419
  12. 12.6.33 + 2.3 = ? (a) 8.73 (b) 8.53 (c) 8.63 (d) 6.56
  13. 13.3.95 + 2.1 = ? (a) 4.16 (b) 6.15 (c) 6.05 (d) 5.95
  14. 14.5.84 + 5.8 = ? (a) 11.54 (b) 6.42 (c) 11.74 (d) 11.64
  15. 15.4.41 + 4.2 = ? (a) 8.51 (b) 8.71 (c) 4.83 (d) 8.61
  16. 16.2.14 + 2.1 = ? (a) 4.34 (b) 2.35 (c) 4.14 (d) 4.24
  17. 17.5.86 + 2.2 = ? (a) 6.08 (b) 8.16 (c) 8.06 (d) 7.96
  18. 18.Which is the smallest: 0.86, 0.8, 0.027, 0.777? (a) 0.86 (b) 0.8 (c) 0.027 (d) 0.777
  19. 19.1.94 + 2.8 = ? (a) 4.74 (b) 2.22 (c) 4.64 (d) 4.84
  20. 20.6.03 + 5.7 = ? (a) 6.6 (b) 11.83 (c) 11.63 (d) 11.73
  21. 21.9.81 + 2.4 = ? (a) 12.11 (b) 12.21 (c) 10.05 (d) 12.31
  22. 22.What is the value of the digit 2 in 23.169? (a) 2 (b) 20 (c) 0.2 (d) 0.02
  23. 23.What is the value of the digit 1 in 67.914? (a) 0.1 (b) 1 (c) 0.01 (d) 0.001
  24. 24.Which is the smallest: 0.677, 0.78, 0.7, 0.024? (a) 0.677 (b) 0.78 (c) 0.7 (d) 0.024
  25. 25.5.87 + 3.6 = ? (a) 9.57 (b) 9.37 (c) 6.23 (d) 9.47
  26. 26.What is the value of the digit 5 in 26.539? (a) 0.5 (b) 0.05 (c) 5 (d) 0.005
  27. 27.9.86 + 4.4 = ? (a) 14.26 (b) 14.16 (c) 10.3 (d) 14.36
  28. 28.4.71 + 7.8 = ? (a) 12.61 (b) 12.51 (c) 12.41 (d) 5.49
  29. 29.What is the value of the digit 4 in 92.413? (a) 0.4 (b) 0.004 (c) 0.04 (d) 4
  30. 30.7.69 + 1.7 = ? (a) 9.29 (b) 9.39 (c) 9.49 (d) 7.86
  31. 31.1.02 + 9.5 = ? (a) 10.42 (b) 1.97 (c) 10.52 (d) 10.62
  32. 32.8.95 + 6.3 = ? (a) 15.35 (b) 15.25 (c) 15.15 (d) 9.58
  33. 33.7.75 + 4.6 = ? (a) 12.35 (b) 8.21 (c) 12.45 (d) 12.25
  34. 34.Which is the greatest: 0.35, 0.3, 0.265, 0.079? (a) 0.35 (b) 0.3 (c) 0.265 (d) 0.079
  35. 35.Which is the greatest: 0.423, 0.59, 0.095, 0.5? (a) 0.423 (b) 0.59 (c) 0.095 (d) 0.5
  36. 36.6.81 + 3.2 = ? (a) 10.11 (b) 10.01 (c) 9.91 (d) 7.13
  37. 37.Which is the smallest: 0.773, 0.89, 0.8, 0.037? (a) 0.773 (b) 0.89 (c) 0.8 (d) 0.037
  38. 38.9.24 + 6.2 = ? (a) 9.86 (b) 15.54 (c) 15.34 (d) 15.44
  39. 39.What is the value of the digit 7 in 78.625? (a) 70 (b) 7 (c) 0.7 (d) 0.07
  40. 40.What is the value of the digit 1 in 86.521? (a) 0.001 (b) 0.01 (c) 0.1 (d) 1

Answer key

  1. 16.79
  2. 1
  3. 0.021
  4. 2
  5. 0.025
  6. 12.24
  7. 1
  8. 0.8
  9. 2.43
  10. 0.61
  11. 0.51
  12. 8.63
  13. 6.05
  14. 11.64
  15. 8.61
  16. 4.24
  17. 8.06
  18. 0.027
  19. 4.74
  20. 11.73
  21. 12.21
  22. 20
  23. 0.01
  24. 0.024
  25. 9.47
  26. 0.5
  27. 14.26
  28. 12.51
  29. 0.4
  30. 9.39
  31. 10.52
  32. 15.25
  33. 12.35
  34. 0.35
  35. 0.59
  36. 10.01
  37. 0.037
  38. 15.44
  39. 70
  40. 0.001

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