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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 538 · 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. 1.9.69 + 9.9 = ? (a) 19.69 (b) 10.68 (c) 19.59 (d) 19.49
  2. 2.Which is the greatest: 0.82, 0.716, 0.8, 0.053? (a) 0.82 (b) 0.716 (c) 0.8 (d) 0.053
  3. 3.What is the value of the digit 2 in 21.398? (a) 20 (b) 0.2 (c) 0.02 (d) 2
  4. 4.What is the value of the digit 6 in 51.268? (a) 0.6 (b) 6 (c) 0.06 (d) 0.006
  5. 5.8.58 + 8.9 = ? (a) 17.38 (b) 17.58 (c) 9.47 (d) 17.48
  6. 6.3.49 + 8.5 = ? (a) 4.34 (b) 11.99 (c) 11.89 (d) 12.09
  7. 7.1.62 + 7.4 = ? (a) 9.02 (b) 9.12 (c) 8.92 (d) 2.36
  8. 8.Which is the smallest: 0.588, 0.6, 0.66, 0.093? (a) 0.588 (b) 0.6 (c) 0.66 (d) 0.093
  9. 9.Which is the smallest: 0.274, 0.37, 0.044, 0.3? (a) 0.274 (b) 0.37 (c) 0.044 (d) 0.3
  10. 10.Which is the greatest: 0.3, 0.36, 0.288, 0.046? (a) 0.3 (b) 0.36 (c) 0.288 (d) 0.046
  11. 11.3.54 + 7.1 = ? (a) 10.64 (b) 10.74 (c) 10.54 (d) 4.25
  12. 12.5.84 + 2.9 = ? (a) 6.13 (b) 8.84 (c) 8.64 (d) 8.74
  13. 13.Which is the smallest: 0.72, 0.073, 0.7, 0.647? (a) 0.72 (b) 0.073 (c) 0.7 (d) 0.647
  14. 14.What is the value of the digit 5 in 92.853? (a) 0.5 (b) 5 (c) 0.05 (d) 0.005
  15. 15.5.24 + 2.8 = ? (a) 8.14 (b) 5.52 (c) 7.94 (d) 8.04
  16. 16.Which is the greatest: 0.4, 0.397, 0.021, 0.41? (a) 0.4 (b) 0.397 (c) 0.021 (d) 0.41
  17. 17.Which is the smallest: 0.35, 0.036, 0.261, 0.3? (a) 0.35 (b) 0.036 (c) 0.261 (d) 0.3
  18. 18.1.22 + 8.3 = ? (a) 9.42 (b) 2.05 (c) 9.62 (d) 9.52
  19. 19.What is the value of the digit 9 in 91.354? (a) 9 (b) 90 (c) 0.09 (d) 0.9
  20. 20.Which is the greatest: 0.3, 0.34, 0.016, 0.288? (a) 0.3 (b) 0.34 (c) 0.016 (d) 0.288
  21. 21.9.48 + 1.5 = ? (a) 11.08 (b) 10.98 (c) 9.63 (d) 10.88
  22. 22.9.83 + 9.9 = ? (a) 10.82 (b) 19.83 (c) 19.63 (d) 19.73
  23. 23.6.16 + 4.1 = ? (a) 6.57 (b) 10.26 (c) 10.16 (d) 10.36
  24. 24.3.41 + 9.1 = ? (a) 12.61 (b) 12.51 (c) 12.41 (d) 4.32
  25. 25.Which is the smallest: 0.769, 0.87, 0.035, 0.8? (a) 0.769 (b) 0.87 (c) 0.035 (d) 0.8
  26. 26.3.68 + 5.9 = ? (a) 9.58 (b) 4.27 (c) 9.68 (d) 9.48
  27. 27.What is the value of the digit 9 in 28.956? (a) 0.009 (b) 0.9 (c) 9 (d) 0.09
  28. 28.What is the value of the digit 7 in 78.461? (a) 7 (b) 0.07 (c) 0.7 (d) 70
  29. 29.Which is the smallest: 0.25, 0.115, 0.2, 0.028? (a) 0.25 (b) 0.115 (c) 0.2 (d) 0.028
  30. 30.9.17 + 1.4 = ? (a) 10.67 (b) 9.31 (c) 10.57 (d) 10.47
  31. 31.Which is the smallest: 0.047, 0.5, 0.56, 0.481? (a) 0.047 (b) 0.5 (c) 0.56 (d) 0.481
  32. 32.3.12 + 2.9 = ? (a) 5.92 (b) 6.02 (c) 3.41 (d) 6.12
  33. 33.What is the value of the digit 1 in 41.256? (a) 10 (b) 0.01 (c) 0.1 (d) 1
  34. 34.Which is the greatest: 0.77, 0.667, 0.069, 0.7? (a) 0.77 (b) 0.667 (c) 0.069 (d) 0.7
  35. 35.Which is the smallest: 0.644, 0.7, 0.093, 0.76? (a) 0.644 (b) 0.7 (c) 0.093 (d) 0.76
  36. 36.Which is the smallest: 0.42, 0.4, 0.024, 0.367? (a) 0.42 (b) 0.4 (c) 0.024 (d) 0.367
  37. 37.What is the value of the digit 9 in 72.149? (a) 9 (b) 0.09 (c) 0.009 (d) 0.9
  38. 38.Which is the smallest: 0.4, 0.49, 0.016, 0.342? (a) 0.4 (b) 0.49 (c) 0.016 (d) 0.342
  39. 39.Which is the greatest: 0.572, 0.63, 0.095, 0.6? (a) 0.572 (b) 0.63 (c) 0.095 (d) 0.6
  40. 40.Which is the greatest: 0.643, 0.7, 0.016, 0.71? (a) 0.643 (b) 0.7 (c) 0.016 (d) 0.71

Answer key

  1. 19.59
  2. 0.82
  3. 20
  4. 0.06
  5. 17.48
  6. 11.99
  7. 9.02
  8. 0.093
  9. 0.044
  10. 0.36
  11. 10.64
  12. 8.74
  13. 0.073
  14. 0.05
  15. 8.04
  16. 0.41
  17. 0.036
  18. 9.52
  19. 90
  20. 0.34
  21. 10.98
  22. 19.73
  23. 10.26
  24. 12.51
  25. 0.035
  26. 9.58
  27. 0.9
  28. 70
  29. 0.028
  30. 10.57
  31. 0.047
  32. 6.02
  33. 1
  34. 0.77
  35. 0.093
  36. 0.024
  37. 0.009
  38. 0.016
  39. 0.63
  40. 0.71

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