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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 992 · 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. 1.4.07 + 7.8 = ? (a) 11.97 (b) 11.77 (c) 11.87 (d) 4.85
  2. 2.9.38 + 4.9 = ? (a) 14.18 (b) 14.28 (c) 9.87 (d) 14.38
  3. 3.Which is the greatest: 0.33, 0.3, 0.223, 0.096? (a) 0.33 (b) 0.3 (c) 0.223 (d) 0.096
  4. 4.Which is the greatest: 0.48, 0.011, 0.322, 0.4? (a) 0.48 (b) 0.011 (c) 0.322 (d) 0.4
  5. 5.7.38 + 2.7 = ? (a) 10.18 (b) 7.65 (c) 10.08 (d) 9.98
  6. 6.5.41 + 4.1 = ? (a) 9.41 (b) 9.51 (c) 5.82 (d) 9.61
  7. 7.8.61 + 6.7 = ? (a) 15.21 (b) 15.31 (c) 15.41 (d) 9.28
  8. 8.What is the value of the digit 1 in 15.698? (a) 1 (b) 0.1 (c) 10 (d) 0.01
  9. 9.1.27 + 7.7 = ? (a) 8.87 (b) 8.97 (c) 2.04 (d) 9.07
  10. 10.9.49 + 8.4 = ? (a) 17.99 (b) 17.89 (c) 10.33 (d) 17.79
  11. 11.Which is the smallest: 0.619, 0.78, 0.7, 0.045? (a) 0.619 (b) 0.78 (c) 0.7 (d) 0.045
  12. 12.Which is the greatest: 0.657, 0.012, 0.72, 0.7? (a) 0.657 (b) 0.012 (c) 0.72 (d) 0.7
  13. 13.9.17 + 3.8 = ? (a) 13.07 (b) 12.87 (c) 9.55 (d) 12.97
  14. 14.What is the value of the digit 3 in 36.254? (a) 0.3 (b) 3 (c) 0.03 (d) 30
  15. 15.8.19 + 4.1 = ? (a) 8.6 (b) 12.19 (c) 12.29 (d) 12.39
  16. 16.9.52 + 4.9 = ? (a) 14.42 (b) 14.32 (c) 10.01 (d) 14.52
  17. 17.Which is the smallest: 0.71, 0.083, 0.618, 0.7? (a) 0.71 (b) 0.083 (c) 0.618 (d) 0.7
  18. 18.6.51 + 8.2 = ? (a) 14.71 (b) 14.61 (c) 7.33 (d) 14.81
  19. 19.Which is the smallest: 0.523, 0.63, 0.6, 0.071? (a) 0.523 (b) 0.63 (c) 0.6 (d) 0.071
  20. 20.2.51 + 4.1 = ? (a) 2.92 (b) 6.61 (c) 6.71 (d) 6.51
  21. 21.What is the value of the digit 1 in 48.156? (a) 0.001 (b) 0.01 (c) 1 (d) 0.1
  22. 22.What is the value of the digit 4 in 25.348? (a) 0.04 (b) 0.4 (c) 0.004 (d) 4
  23. 23.2.05 + 9.8 = ? (a) 11.75 (b) 3.03 (c) 11.85 (d) 11.95
  24. 24.Which is the smallest: 0.66, 0.016, 0.568, 0.6? (a) 0.66 (b) 0.016 (c) 0.568 (d) 0.6
  25. 25.What is the value of the digit 4 in 31.854? (a) 0.04 (b) 0.4 (c) 0.004 (d) 4
  26. 26.2.49 + 6.4 = ? (a) 8.89 (b) 8.79 (c) 3.13 (d) 8.99
  27. 27.Which is the greatest: 0.36, 0.242, 0.3, 0.032? (a) 0.36 (b) 0.242 (c) 0.3 (d) 0.032
  28. 28.1.25 + 7.1 = ? (a) 8.45 (b) 1.96 (c) 8.25 (d) 8.35
  29. 29.2.21 + 5.4 = ? (a) 7.71 (b) 7.51 (c) 7.61 (d) 2.75
  30. 30.5.89 + 1.9 = ? (a) 7.69 (b) 7.79 (c) 6.08 (d) 7.89
  31. 31.7.87 + 2.8 = ? (a) 10.67 (b) 8.15 (c) 10.77 (d) 10.57
  32. 32.9.22 + 5.7 = ? (a) 15.02 (b) 14.82 (c) 14.92 (d) 9.79
  33. 33.Which is the greatest: 0.7, 0.081, 0.696, 0.78? (a) 0.7 (b) 0.081 (c) 0.696 (d) 0.78
  34. 34.What is the value of the digit 1 in 46.531? (a) 0.1 (b) 0.01 (c) 0.001 (d) 1
  35. 35.Which is the smallest: 0.2, 0.26, 0.065, 0.172? (a) 0.2 (b) 0.26 (c) 0.065 (d) 0.172
  36. 36.What is the value of the digit 9 in 96.751? (a) 0.9 (b) 9 (c) 0.09 (d) 90
  37. 37.What is the value of the digit 2 in 56.972? (a) 0.02 (b) 2 (c) 0.002 (d) 0.2
  38. 38.What is the value of the digit 1 in 81.293? (a) 0.1 (b) 10 (c) 0.01 (d) 1
  39. 39.2.94 + 2.6 = ? (a) 5.64 (b) 5.54 (c) 5.44 (d) 3.2
  40. 40.What is the value of the digit 2 in 25.974? (a) 0.02 (b) 2 (c) 0.2 (d) 20

Answer key

  1. 11.87
  2. 14.28
  3. 0.33
  4. 0.48
  5. 10.08
  6. 9.51
  7. 15.31
  8. 10
  9. 8.97
  10. 17.89
  11. 0.045
  12. 0.72
  13. 12.97
  14. 30
  15. 12.29
  16. 14.42
  17. 0.083
  18. 14.71
  19. 0.071
  20. 6.61
  21. 0.1
  22. 0.04
  23. 11.85
  24. 0.016
  25. 0.004
  26. 8.89
  27. 0.36
  28. 8.35
  29. 7.61
  30. 7.79
  31. 10.67
  32. 14.92
  33. 0.78
  34. 0.001
  35. 0.065
  36. 90
  37. 0.002
  38. 1
  39. 5.54
  40. 20

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