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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 121 · 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. 1.8.27 + 3.8 = ? (a) 12.07 (b) 8.65 (c) 12.17 (d) 11.97
  2. 2.Which is the greatest: 0.46, 0.343, 0.4, 0.039? (a) 0.46 (b) 0.343 (c) 0.4 (d) 0.039
  3. 3.2.25 + 9.8 = ? (a) 11.95 (b) 12.15 (c) 12.05 (d) 3.23
  4. 4.Which is the smallest: 0.8, 0.052, 0.86, 0.782? (a) 0.8 (b) 0.052 (c) 0.86 (d) 0.782
  5. 5.What is the value of the digit 2 in 26.537? (a) 2 (b) 20 (c) 0.02 (d) 0.2
  6. 6.8.44 + 2.4 = ? (a) 10.74 (b) 10.84 (c) 8.68 (d) 10.94
  7. 7.Which is the smallest: 0.2, 0.22, 0.099, 0.155? (a) 0.2 (b) 0.22 (c) 0.099 (d) 0.155
  8. 8.6.49 + 9.9 = ? (a) 16.39 (b) 7.48 (c) 16.29 (d) 16.49
  9. 9.Which is the greatest: 0.043, 0.276, 0.3, 0.31? (a) 0.043 (b) 0.276 (c) 0.3 (d) 0.31
  10. 10.Which is the greatest: 0.2, 0.23, 0.051, 0.179? (a) 0.2 (b) 0.23 (c) 0.051 (d) 0.179
  11. 11.9.47 + 7.9 = ? (a) 17.37 (b) 17.27 (c) 17.47 (d) 10.26
  12. 12.Which is the greatest: 0.62, 0.037, 0.561, 0.6? (a) 0.62 (b) 0.037 (c) 0.561 (d) 0.6
  13. 13.Which is the smallest: 0.024, 0.71, 0.7, 0.621? (a) 0.024 (b) 0.71 (c) 0.7 (d) 0.621
  14. 14.Which is the greatest: 0.012, 0.2, 0.29, 0.192? (a) 0.012 (b) 0.2 (c) 0.29 (d) 0.192
  15. 15.9.72 + 2.1 = ? (a) 11.72 (b) 11.82 (c) 9.93 (d) 11.92
  16. 16.Which is the greatest: 0.271, 0.31, 0.3, 0.037? (a) 0.271 (b) 0.31 (c) 0.3 (d) 0.037
  17. 17.What is the value of the digit 9 in 45.239? (a) 0.09 (b) 0.9 (c) 0.009 (d) 9
  18. 18.What is the value of the digit 6 in 64.275? (a) 60 (b) 0.6 (c) 0.06 (d) 6
  19. 19.What is the value of the digit 2 in 57.482? (a) 0.02 (b) 0.002 (c) 2 (d) 0.2
  20. 20.Which is the greatest: 0.31, 0.054, 0.226, 0.3? (a) 0.31 (b) 0.054 (c) 0.226 (d) 0.3
  21. 21.What is the value of the digit 7 in 48.276? (a) 0.007 (b) 7 (c) 0.7 (d) 0.07
  22. 22.Which is the greatest: 0.4, 0.41, 0.013, 0.361? (a) 0.4 (b) 0.41 (c) 0.013 (d) 0.361
  23. 23.2.17 + 4.4 = ? (a) 2.61 (b) 6.67 (c) 6.47 (d) 6.57
  24. 24.What is the value of the digit 5 in 13.956? (a) 5 (b) 0.005 (c) 0.5 (d) 0.05
  25. 25.What is the value of the digit 3 in 83.492? (a) 0.03 (b) 3 (c) 30 (d) 0.3
  26. 26.What is the value of the digit 1 in 14.893? (a) 0.01 (b) 1 (c) 0.1 (d) 10
  27. 27.2.42 + 2.8 = ? (a) 2.7 (b) 5.32 (c) 5.12 (d) 5.22
  28. 28.What is the value of the digit 5 in 19.576? (a) 0.005 (b) 5 (c) 0.5 (d) 0.05
  29. 29.Which is the smallest: 0.26, 0.127, 0.034, 0.2? (a) 0.26 (b) 0.127 (c) 0.034 (d) 0.2
  30. 30.1.85 + 7.9 = ? (a) 9.75 (b) 9.65 (c) 9.85 (d) 2.64
  31. 31.Which is the greatest: 0.2, 0.018, 0.28, 0.122? (a) 0.2 (b) 0.018 (c) 0.28 (d) 0.122
  32. 32.What is the value of the digit 6 in 36.198? (a) 0.6 (b) 60 (c) 0.06 (d) 6
  33. 33.Which is the greatest: 0.55, 0.5, 0.449, 0.017? (a) 0.55 (b) 0.5 (c) 0.449 (d) 0.017
  34. 34.What is the value of the digit 2 in 91.742? (a) 0.02 (b) 2 (c) 0.002 (d) 0.2
  35. 35.What is the value of the digit 4 in 28.143? (a) 0.004 (b) 0.04 (c) 4 (d) 0.4
  36. 36.2.51 + 4.9 = ? (a) 3 (b) 7.31 (c) 7.41 (d) 7.51
  37. 37.3.22 + 1.8 = ? (a) 3.4 (b) 4.92 (c) 5.02 (d) 5.12
  38. 38.What is the value of the digit 4 in 64.291? (a) 4 (b) 0.4 (c) 40 (d) 0.04
  39. 39.6.89 + 5.2 = ? (a) 12.09 (b) 7.41 (c) 12.19 (d) 11.99
  40. 40.Which is the smallest: 0.031, 0.397, 0.4, 0.45? (a) 0.031 (b) 0.397 (c) 0.4 (d) 0.45

Answer key

  1. 12.07
  2. 0.46
  3. 12.05
  4. 0.052
  5. 20
  6. 10.84
  7. 0.099
  8. 16.39
  9. 0.31
  10. 0.23
  11. 17.37
  12. 0.62
  13. 0.024
  14. 0.29
  15. 11.82
  16. 0.31
  17. 0.009
  18. 60
  19. 0.002
  20. 0.31
  21. 0.07
  22. 0.41
  23. 6.57
  24. 0.05
  25. 3
  26. 10
  27. 5.22
  28. 0.5
  29. 0.034
  30. 9.75
  31. 0.28
  32. 6
  33. 0.55
  34. 0.002
  35. 0.04
  36. 7.41
  37. 5.02
  38. 4
  39. 12.09
  40. 0.031

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