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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 685 · 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. 1.6.08 + 9.8 = ? (a) 7.06 (b) 15.98 (c) 15.78 (d) 15.88
  2. 2.Which is the greatest: 0.71, 0.7, 0.043, 0.666? (a) 0.71 (b) 0.7 (c) 0.043 (d) 0.666
  3. 3.Which is the greatest: 0.48, 0.4, 0.019, 0.348? (a) 0.48 (b) 0.4 (c) 0.019 (d) 0.348
  4. 4.Which is the greatest: 0.016, 0.24, 0.2, 0.137? (a) 0.016 (b) 0.24 (c) 0.2 (d) 0.137
  5. 5.Which is the greatest: 0.47, 0.4, 0.032, 0.338? (a) 0.47 (b) 0.4 (c) 0.032 (d) 0.338
  6. 6.Which is the smallest: 0.626, 0.79, 0.7, 0.088? (a) 0.626 (b) 0.79 (c) 0.7 (d) 0.088
  7. 7.1.35 + 8.4 = ? (a) 9.85 (b) 9.65 (c) 2.19 (d) 9.75
  8. 8.What is the value of the digit 1 in 98.127? (a) 0.01 (b) 0.1 (c) 0.001 (d) 1
  9. 9.1.39 + 1.4 = ? (a) 2.69 (b) 1.53 (c) 2.79 (d) 2.89
  10. 10.What is the value of the digit 7 in 79.164? (a) 0.7 (b) 7 (c) 0.07 (d) 70
  11. 11.9.61 + 2.6 = ? (a) 12.21 (b) 9.87 (c) 12.11 (d) 12.31
  12. 12.What is the value of the digit 2 in 21.683? (a) 0.02 (b) 20 (c) 2 (d) 0.2
  13. 13.2.59 + 2.9 = ? (a) 2.88 (b) 5.39 (c) 5.59 (d) 5.49
  14. 14.Which is the greatest: 0.23, 0.2, 0.111, 0.018? (a) 0.23 (b) 0.2 (c) 0.111 (d) 0.018
  15. 15.Which is the greatest: 0.43, 0.077, 0.365, 0.4? (a) 0.43 (b) 0.077 (c) 0.365 (d) 0.4
  16. 16.Which is the smallest: 0.136, 0.2, 0.28, 0.072? (a) 0.136 (b) 0.2 (c) 0.28 (d) 0.072
  17. 17.6.85 + 7.6 = ? (a) 14.35 (b) 14.45 (c) 14.55 (d) 7.61
  18. 18.7.75 + 3.1 = ? (a) 10.95 (b) 8.06 (c) 10.85 (d) 10.75
  19. 19.What is the value of the digit 9 in 54.931? (a) 0.009 (b) 0.9 (c) 9 (d) 0.09
  20. 20.Which is the smallest: 0.021, 0.6, 0.67, 0.572? (a) 0.021 (b) 0.6 (c) 0.67 (d) 0.572
  21. 21.Which is the smallest: 0.35, 0.272, 0.093, 0.3? (a) 0.35 (b) 0.272 (c) 0.093 (d) 0.3
  22. 22.1.56 + 4.8 = ? (a) 6.26 (b) 6.36 (c) 2.04 (d) 6.46
  23. 23.What is the value of the digit 5 in 37.659? (a) 0.5 (b) 5 (c) 0.005 (d) 0.05
  24. 24.What is the value of the digit 1 in 15.492? (a) 10 (b) 0.1 (c) 0.01 (d) 1
  25. 25.What is the value of the digit 9 in 16.398? (a) 0.009 (b) 0.09 (c) 0.9 (d) 9
  26. 26.Which is the smallest: 0.2, 0.21, 0.036, 0.194? (a) 0.2 (b) 0.21 (c) 0.036 (d) 0.194
  27. 27.4.72 + 4.3 = ? (a) 5.15 (b) 8.92 (c) 9.02 (d) 9.12
  28. 28.2.23 + 3.5 = ? (a) 5.83 (b) 5.63 (c) 5.73 (d) 2.58
  29. 29.7.47 + 7.2 = ? (a) 14.67 (b) 14.77 (c) 8.19 (d) 14.57
  30. 30.Which is the smallest: 0.054, 0.43, 0.4, 0.375? (a) 0.054 (b) 0.43 (c) 0.4 (d) 0.375
  31. 31.8.26 + 2.5 = ? (a) 8.51 (b) 10.66 (c) 10.86 (d) 10.76
  32. 32.What is the value of the digit 6 in 18.462? (a) 6 (b) 0.6 (c) 0.006 (d) 0.06
  33. 33.6.73 + 4.7 = ? (a) 11.53 (b) 7.2 (c) 11.33 (d) 11.43
  34. 34.What is the value of the digit 4 in 15.463? (a) 0.004 (b) 0.4 (c) 4 (d) 0.04
  35. 35.3.08 + 2.2 = ? (a) 5.38 (b) 5.18 (c) 3.3 (d) 5.28
  36. 36.9.55 + 9.4 = ? (a) 18.95 (b) 10.49 (c) 18.85 (d) 19.05
  37. 37.7.21 + 8.4 = ? (a) 8.05 (b) 15.51 (c) 15.61 (d) 15.71
  38. 38.Which is the greatest: 0.058, 0.8, 0.752, 0.89? (a) 0.058 (b) 0.8 (c) 0.752 (d) 0.89
  39. 39.Which is the greatest: 0.192, 0.24, 0.044, 0.2? (a) 0.192 (b) 0.24 (c) 0.044 (d) 0.2
  40. 40.What is the value of the digit 7 in 38.275? (a) 0.07 (b) 0.007 (c) 0.7 (d) 7

Answer key

  1. 15.88
  2. 0.71
  3. 0.48
  4. 0.24
  5. 0.47
  6. 0.088
  7. 9.75
  8. 0.1
  9. 2.79
  10. 70
  11. 12.21
  12. 20
  13. 5.49
  14. 0.23
  15. 0.43
  16. 0.072
  17. 14.45
  18. 10.85
  19. 0.9
  20. 0.021
  21. 0.093
  22. 6.36
  23. 0.05
  24. 10
  25. 0.09
  26. 0.036
  27. 9.02
  28. 5.73
  29. 14.67
  30. 0.054
  31. 10.76
  32. 0.06
  33. 11.43
  34. 0.4
  35. 5.28
  36. 18.95
  37. 15.61
  38. 0.89
  39. 0.24
  40. 0.07

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