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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 605 · 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.Which is the smallest: 0.7, 0.098, 0.77, 0.672? (a) 0.7 (b) 0.098 (c) 0.77 (d) 0.672
  2. 2.9.81 + 8.7 = ? (a) 10.68 (b) 18.41 (c) 18.51 (d) 18.61
  3. 3.1.57 + 3.1 = ? (a) 4.57 (b) 4.77 (c) 4.67 (d) 1.88
  4. 4.3.43 + 1.1 = ? (a) 3.54 (b) 4.43 (c) 4.53 (d) 4.63
  5. 5.Which is the greatest: 0.048, 0.32, 0.265, 0.3? (a) 0.048 (b) 0.32 (c) 0.265 (d) 0.3
  6. 6.What is the value of the digit 5 in 98.315? (a) 5 (b) 0.5 (c) 0.05 (d) 0.005
  7. 7.Which is the smallest: 0.342, 0.016, 0.4, 0.44? (a) 0.342 (b) 0.016 (c) 0.4 (d) 0.44
  8. 8.2.76 + 8.3 = ? (a) 10.96 (b) 11.06 (c) 11.16 (d) 3.59
  9. 9.What is the value of the digit 4 in 21.749? (a) 0.4 (b) 0.004 (c) 4 (d) 0.04
  10. 10.2.28 + 1.4 = ? (a) 3.78 (b) 3.68 (c) 3.58 (d) 2.42
  11. 11.What is the value of the digit 4 in 57.924? (a) 4 (b) 0.04 (c) 0.4 (d) 0.004
  12. 12.Which is the smallest: 0.035, 0.6, 0.542, 0.66? (a) 0.035 (b) 0.6 (c) 0.542 (d) 0.66
  13. 13.What is the value of the digit 2 in 38.215? (a) 0.2 (b) 0.002 (c) 0.02 (d) 2
  14. 14.Which is the greatest: 0.8, 0.084, 0.82, 0.722? (a) 0.8 (b) 0.084 (c) 0.82 (d) 0.722
  15. 15.What is the value of the digit 4 in 14.972? (a) 40 (b) 0.04 (c) 4 (d) 0.4
  16. 16.Which is the greatest: 0.347, 0.48, 0.4, 0.081? (a) 0.347 (b) 0.48 (c) 0.4 (d) 0.081
  17. 17.1.31 + 2.2 = ? (a) 3.61 (b) 3.51 (c) 3.41 (d) 1.53
  18. 18.Which is the greatest: 0.2, 0.141, 0.077, 0.25? (a) 0.2 (b) 0.141 (c) 0.077 (d) 0.25
  19. 19.7.76 + 9.4 = ? (a) 17.06 (b) 17.26 (c) 17.16 (d) 8.7
  20. 20.Which is the greatest: 0.78, 0.7, 0.039, 0.692? (a) 0.78 (b) 0.7 (c) 0.039 (d) 0.692
  21. 21.7.58 + 9.2 = ? (a) 16.88 (b) 8.5 (c) 16.78 (d) 16.68
  22. 22.Which is the greatest: 0.87, 0.717, 0.8, 0.056? (a) 0.87 (b) 0.717 (c) 0.8 (d) 0.056
  23. 23.Which is the smallest: 0.59, 0.5, 0.042, 0.478? (a) 0.59 (b) 0.5 (c) 0.042 (d) 0.478
  24. 24.What is the value of the digit 7 in 25.437? (a) 0.7 (b) 7 (c) 0.07 (d) 0.007
  25. 25.Which is the smallest: 0.098, 0.759, 0.8, 0.84? (a) 0.098 (b) 0.759 (c) 0.8 (d) 0.84
  26. 26.4.38 + 5.4 = ? (a) 9.88 (b) 4.92 (c) 9.68 (d) 9.78
  27. 27.7.78 + 6.6 = ? (a) 8.44 (b) 14.48 (c) 14.38 (d) 14.28
  28. 28.What is the value of the digit 3 in 37.184? (a) 0.3 (b) 0.03 (c) 30 (d) 3
  29. 29.What is the value of the digit 9 in 87.964? (a) 0.09 (b) 0.9 (c) 9 (d) 0.009
  30. 30.Which is the greatest: 0.273, 0.33, 0.062, 0.3? (a) 0.273 (b) 0.33 (c) 0.062 (d) 0.3
  31. 31.4.42 + 3.7 = ? (a) 8.22 (b) 4.79 (c) 8.02 (d) 8.12
  32. 32.Which is the smallest: 0.067, 0.181, 0.27, 0.2? (a) 0.067 (b) 0.181 (c) 0.27 (d) 0.2
  33. 33.Which is the greatest: 0.29, 0.182, 0.2, 0.036? (a) 0.29 (b) 0.182 (c) 0.2 (d) 0.036
  34. 34.Which is the smallest: 0.082, 0.3, 0.211, 0.32? (a) 0.082 (b) 0.3 (c) 0.211 (d) 0.32
  35. 35.7.51 + 8.7 = ? (a) 8.38 (b) 16.11 (c) 16.21 (d) 16.31
  36. 36.1.75 + 2.6 = ? (a) 2.01 (b) 4.45 (c) 4.25 (d) 4.35
  37. 37.Which is the smallest: 0.046, 0.63, 0.522, 0.6? (a) 0.046 (b) 0.63 (c) 0.522 (d) 0.6
  38. 38.9.98 + 1.9 = ? (a) 11.98 (b) 10.17 (c) 11.88 (d) 11.78
  39. 39.2.36 + 8.5 = ? (a) 10.86 (b) 3.21 (c) 10.76 (d) 10.96
  40. 40.7.58 + 5.3 = ? (a) 12.88 (b) 8.11 (c) 12.98 (d) 12.78

Answer key

  1. 0.098
  2. 18.51
  3. 4.67
  4. 4.53
  5. 0.32
  6. 0.005
  7. 0.016
  8. 11.06
  9. 0.04
  10. 3.68
  11. 0.004
  12. 0.035
  13. 0.2
  14. 0.82
  15. 4
  16. 0.48
  17. 3.51
  18. 0.25
  19. 17.16
  20. 0.78
  21. 16.78
  22. 0.87
  23. 0.042
  24. 0.007
  25. 0.098
  26. 9.78
  27. 14.38
  28. 30
  29. 0.9
  30. 0.33
  31. 8.12
  32. 0.067
  33. 0.29
  34. 0.082
  35. 16.21
  36. 4.35
  37. 0.046
  38. 11.88
  39. 10.86
  40. 12.88

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