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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 768 · 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. 1.1.09 + 1.5 = ? (a) 1.24 (b) 2.59 (c) 2.49 (d) 2.69
  2. 2.What is the value of the digit 1 in 87.153? (a) 0.001 (b) 1 (c) 0.1 (d) 0.01
  3. 3.9.39 + 7.1 = ? (a) 16.59 (b) 10.1 (c) 16.39 (d) 16.49
  4. 4.What is the value of the digit 7 in 12.749? (a) 7 (b) 0.007 (c) 0.07 (d) 0.7
  5. 5.7.98 + 8.6 = ? (a) 8.84 (b) 16.48 (c) 16.68 (d) 16.58
  6. 6.4.91 + 3.2 = ? (a) 8.21 (b) 8.01 (c) 8.11 (d) 5.23
  7. 7.What is the value of the digit 9 in 41.395? (a) 0.9 (b) 9 (c) 0.009 (d) 0.09
  8. 8.8.42 + 6.1 = ? (a) 14.42 (b) 14.52 (c) 14.62 (d) 9.03
  9. 9.3.37 + 8.7 = ? (a) 12.07 (b) 11.97 (c) 12.17 (d) 4.24
  10. 10.Which is the greatest: 0.034, 0.228, 0.32, 0.3? (a) 0.034 (b) 0.228 (c) 0.32 (d) 0.3
  11. 11.1.65 + 3.7 = ? (a) 5.35 (b) 2.02 (c) 5.45 (d) 5.25
  12. 12.What is the value of the digit 6 in 45.816? (a) 0.06 (b) 0.006 (c) 0.6 (d) 6
  13. 13.7.98 + 8.4 = ? (a) 16.28 (b) 16.38 (c) 8.82 (d) 16.48
  14. 14.Which is the smallest: 0.35, 0.264, 0.3, 0.061? (a) 0.35 (b) 0.264 (c) 0.3 (d) 0.061
  15. 15.1.64 + 8.8 = ? (a) 2.52 (b) 10.44 (c) 10.34 (d) 10.54
  16. 16.1.59 + 7.7 = ? (a) 9.19 (b) 9.39 (c) 9.29 (d) 2.36
  17. 17.Which is the smallest: 0.29, 0.082, 0.186, 0.2? (a) 0.29 (b) 0.082 (c) 0.186 (d) 0.2
  18. 18.3.92 + 3.8 = ? (a) 7.82 (b) 4.3 (c) 7.62 (d) 7.72
  19. 19.2.11 + 2.8 = ? (a) 2.39 (b) 5.01 (c) 4.81 (d) 4.91
  20. 20.4.13 + 7.3 = ? (a) 4.86 (b) 11.53 (c) 11.43 (d) 11.33
  21. 21.6.64 + 2.8 = ? (a) 9.44 (b) 9.54 (c) 9.34 (d) 6.92
  22. 22.5.82 + 5.2 = ? (a) 11.12 (b) 10.92 (c) 6.34 (d) 11.02
  23. 23.What is the value of the digit 2 in 68.529? (a) 0.2 (b) 2 (c) 0.002 (d) 0.02
  24. 24.Which is the smallest: 0.259, 0.064, 0.3, 0.34? (a) 0.259 (b) 0.064 (c) 0.3 (d) 0.34
  25. 25.Which is the greatest: 0.83, 0.741, 0.8, 0.022? (a) 0.83 (b) 0.741 (c) 0.8 (d) 0.022
  26. 26.1.07 + 1.5 = ? (a) 1.22 (b) 2.47 (c) 2.57 (d) 2.67
  27. 27.3.49 + 7.9 = ? (a) 4.28 (b) 11.29 (c) 11.49 (d) 11.39
  28. 28.Which is the greatest: 0.2, 0.144, 0.27, 0.065? (a) 0.2 (b) 0.144 (c) 0.27 (d) 0.065
  29. 29.1.46 + 4.4 = ? (a) 5.76 (b) 1.9 (c) 5.86 (d) 5.96
  30. 30.Which is the smallest: 0.3, 0.255, 0.36, 0.062? (a) 0.3 (b) 0.255 (c) 0.36 (d) 0.062
  31. 31.What is the value of the digit 9 in 27.419? (a) 0.9 (b) 0.09 (c) 9 (d) 0.009
  32. 32.4.41 + 2.5 = ? (a) 6.91 (b) 7.01 (c) 6.81 (d) 4.66
  33. 33.Which is the smallest: 0.6, 0.65, 0.052, 0.559? (a) 0.6 (b) 0.65 (c) 0.052 (d) 0.559
  34. 34.6.39 + 6.2 = ? (a) 12.49 (b) 12.59 (c) 7.01 (d) 12.69
  35. 35.2.87 + 2.2 = ? (a) 4.97 (b) 3.09 (c) 5.17 (d) 5.07
  36. 36.Which is the greatest: 0.379, 0.43, 0.014, 0.4? (a) 0.379 (b) 0.43 (c) 0.014 (d) 0.4
  37. 37.5.59 + 5.3 = ? (a) 10.99 (b) 6.12 (c) 10.79 (d) 10.89
  38. 38.6.68 + 7.1 = ? (a) 13.88 (b) 13.78 (c) 13.68 (d) 7.39
  39. 39.3.84 + 3.6 = ? (a) 7.54 (b) 4.2 (c) 7.44 (d) 7.34
  40. 40.Which is the smallest: 0.099, 0.294, 0.36, 0.3? (a) 0.099 (b) 0.294 (c) 0.36 (d) 0.3

Answer key

  1. 2.59
  2. 0.1
  3. 16.49
  4. 0.7
  5. 16.58
  6. 8.11
  7. 0.09
  8. 14.52
  9. 12.07
  10. 0.32
  11. 5.35
  12. 0.006
  13. 16.38
  14. 0.061
  15. 10.44
  16. 9.29
  17. 0.082
  18. 7.72
  19. 4.91
  20. 11.43
  21. 9.44
  22. 11.02
  23. 0.02
  24. 0.064
  25. 0.83
  26. 2.57
  27. 11.39
  28. 0.27
  29. 5.86
  30. 0.062
  31. 0.009
  32. 6.91
  33. 0.052
  34. 12.59
  35. 5.07
  36. 0.43
  37. 10.89
  38. 13.78
  39. 7.44
  40. 0.099

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