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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 635 · 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. 1.5.37 + 1.7 = ? (a) 5.54 (b) 7.17 (c) 6.97 (d) 7.07
  2. 2.8.61 + 1.7 = ? (a) 10.41 (b) 8.78 (c) 10.31 (d) 10.21
  3. 3.Which is the greatest: 0.72, 0.7, 0.677, 0.035? (a) 0.72 (b) 0.7 (c) 0.677 (d) 0.035
  4. 4.7.21 + 9.5 = ? (a) 16.61 (b) 16.71 (c) 16.81 (d) 8.16
  5. 5.Which is the smallest: 0.55, 0.5, 0.459, 0.041? (a) 0.55 (b) 0.5 (c) 0.459 (d) 0.041
  6. 6.2.32 + 9.1 = ? (a) 11.32 (b) 3.23 (c) 11.42 (d) 11.52
  7. 7.What is the value of the digit 2 in 82.351? (a) 0.2 (b) 20 (c) 2 (d) 0.02
  8. 8.1.24 + 7.3 = ? (a) 1.97 (b) 8.44 (c) 8.54 (d) 8.64
  9. 9.Which is the greatest: 0.63, 0.6, 0.571, 0.047? (a) 0.63 (b) 0.6 (c) 0.571 (d) 0.047
  10. 10.What is the value of the digit 3 in 34.265? (a) 3 (b) 0.3 (c) 30 (d) 0.03
  11. 11.1.46 + 7.6 = ? (a) 9.16 (b) 8.96 (c) 2.22 (d) 9.06
  12. 12.Which is the greatest: 0.7, 0.79, 0.015, 0.624? (a) 0.7 (b) 0.79 (c) 0.015 (d) 0.624
  13. 13.Which is the smallest: 0.048, 0.56, 0.454, 0.5? (a) 0.048 (b) 0.56 (c) 0.454 (d) 0.5
  14. 14.9.25 + 8.7 = ? (a) 17.95 (b) 17.85 (c) 10.12 (d) 18.05
  15. 15.What is the value of the digit 6 in 29.163? (a) 0.006 (b) 0.6 (c) 0.06 (d) 6
  16. 16.Which is the smallest: 0.032, 0.569, 0.6, 0.62? (a) 0.032 (b) 0.569 (c) 0.6 (d) 0.62
  17. 17.Which is the greatest: 0.244, 0.39, 0.051, 0.3? (a) 0.244 (b) 0.39 (c) 0.051 (d) 0.3
  18. 18.2.87 + 7.4 = ? (a) 10.17 (b) 3.61 (c) 10.27 (d) 10.37
  19. 19.Which is the greatest: 0.132, 0.066, 0.21, 0.2? (a) 0.132 (b) 0.066 (c) 0.21 (d) 0.2
  20. 20.Which is the smallest: 0.86, 0.8, 0.054, 0.772? (a) 0.86 (b) 0.8 (c) 0.054 (d) 0.772
  21. 21.What is the value of the digit 9 in 93.274? (a) 9 (b) 0.9 (c) 0.09 (d) 90
  22. 22.Which is the greatest: 0.072, 0.76, 0.7, 0.631? (a) 0.072 (b) 0.76 (c) 0.7 (d) 0.631
  23. 23.Which is the greatest: 0.049, 0.5, 0.58, 0.462? (a) 0.049 (b) 0.5 (c) 0.58 (d) 0.462
  24. 24.What is the value of the digit 7 in 26.387? (a) 7 (b) 0.007 (c) 0.07 (d) 0.7
  25. 25.8.53 + 1.8 = ? (a) 10.43 (b) 8.71 (c) 10.33 (d) 10.23
  26. 26.7.58 + 1.8 = ? (a) 9.38 (b) 7.76 (c) 9.48 (d) 9.28
  27. 27.5.89 + 5.5 = ? (a) 6.44 (b) 11.49 (c) 11.29 (d) 11.39
  28. 28.1.21 + 5.1 = ? (a) 6.21 (b) 6.41 (c) 6.31 (d) 1.72
  29. 29.Which is the greatest: 0.089, 0.3, 0.288, 0.34? (a) 0.089 (b) 0.3 (c) 0.288 (d) 0.34
  30. 30.What is the value of the digit 6 in 92.416? (a) 0.006 (b) 0.06 (c) 6 (d) 0.6
  31. 31.Which is the greatest: 0.5, 0.55, 0.054, 0.478? (a) 0.5 (b) 0.55 (c) 0.054 (d) 0.478
  32. 32.8.36 + 1.4 = ? (a) 8.5 (b) 9.86 (c) 9.66 (d) 9.76
  33. 33.What is the value of the digit 2 in 36.125? (a) 0.002 (b) 0.02 (c) 0.2 (d) 2
  34. 34.Which is the greatest: 0.567, 0.62, 0.079, 0.6? (a) 0.567 (b) 0.62 (c) 0.079 (d) 0.6
  35. 35.Which is the smallest: 0.068, 0.57, 0.481, 0.5? (a) 0.068 (b) 0.57 (c) 0.481 (d) 0.5
  36. 36.9.29 + 5.7 = ? (a) 14.99 (b) 15.09 (c) 14.89 (d) 9.86
  37. 37.4.88 + 8.5 = ? (a) 13.48 (b) 5.73 (c) 13.28 (d) 13.38
  38. 38.Which is the greatest: 0.588, 0.6, 0.084, 0.67? (a) 0.588 (b) 0.6 (c) 0.084 (d) 0.67
  39. 39.What is the value of the digit 5 in 72.345? (a) 5 (b) 0.5 (c) 0.05 (d) 0.005
  40. 40.What is the value of the digit 4 in 65.714? (a) 0.4 (b) 4 (c) 0.004 (d) 0.04

Answer key

  1. 7.07
  2. 10.31
  3. 0.72
  4. 16.71
  5. 0.041
  6. 11.42
  7. 2
  8. 8.54
  9. 0.63
  10. 30
  11. 9.06
  12. 0.79
  13. 0.048
  14. 17.95
  15. 0.06
  16. 0.032
  17. 0.39
  18. 10.27
  19. 0.21
  20. 0.054
  21. 90
  22. 0.76
  23. 0.58
  24. 0.007
  25. 10.33
  26. 9.38
  27. 11.39
  28. 6.31
  29. 0.34
  30. 0.006
  31. 0.55
  32. 9.76
  33. 0.02
  34. 0.62
  35. 0.068
  36. 14.99
  37. 13.38
  38. 0.67
  39. 0.005
  40. 0.004

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