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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 828 · 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.What is the value of the digit 8 in 81.543? (a) 0.8 (b) 80 (c) 8 (d) 0.08
  2. 2.8.75 + 8.5 = ? (a) 17.35 (b) 17.15 (c) 9.6 (d) 17.25
  3. 3.Which is the smallest: 0.063, 0.86, 0.8, 0.739? (a) 0.063 (b) 0.86 (c) 0.8 (d) 0.739
  4. 4.2.31 + 7.7 = ? (a) 10.01 (b) 9.91 (c) 3.08 (d) 10.11
  5. 5.What is the value of the digit 5 in 58.412? (a) 0.05 (b) 50 (c) 5 (d) 0.5
  6. 6.2.05 + 2.1 = ? (a) 4.15 (b) 2.26 (c) 4.05 (d) 4.25
  7. 7.6.81 + 1.5 = ? (a) 8.21 (b) 8.31 (c) 8.41 (d) 6.96
  8. 8.1.13 + 1.4 = ? (a) 2.63 (b) 1.27 (c) 2.53 (d) 2.43
  9. 9.5.41 + 4.5 = ? (a) 9.81 (b) 9.91 (c) 10.01 (d) 5.86
  10. 10.1.98 + 9.6 = ? (a) 11.68 (b) 11.48 (c) 2.94 (d) 11.58
  11. 11.What is the value of the digit 7 in 19.674? (a) 7 (b) 0.07 (c) 0.7 (d) 0.007
  12. 12.What is the value of the digit 7 in 57.238? (a) 70 (b) 0.7 (c) 0.07 (d) 7
  13. 13.What is the value of the digit 6 in 42.186? (a) 0.06 (b) 0.006 (c) 0.6 (d) 6
  14. 14.9.45 + 8.5 = ? (a) 10.3 (b) 18.05 (c) 17.95 (d) 17.85
  15. 15.7.29 + 8.6 = ? (a) 15.79 (b) 15.89 (c) 8.15 (d) 15.99
  16. 16.What is the value of the digit 4 in 46.278? (a) 4 (b) 0.04 (c) 0.4 (d) 40
  17. 17.What is the value of the digit 3 in 76.384? (a) 0.3 (b) 0.003 (c) 3 (d) 0.03
  18. 18.7.56 + 2.7 = ? (a) 7.83 (b) 10.16 (c) 10.36 (d) 10.26
  19. 19.5.35 + 2.4 = ? (a) 7.85 (b) 7.75 (c) 5.59 (d) 7.65
  20. 20.7.76 + 3.9 = ? (a) 8.15 (b) 11.56 (c) 11.76 (d) 11.66
  21. 21.What is the value of the digit 2 in 29.751? (a) 20 (b) 0.02 (c) 2 (d) 0.2
  22. 22.Which is the greatest: 0.366, 0.045, 0.4, 0.43? (a) 0.366 (b) 0.045 (c) 0.4 (d) 0.43
  23. 23.6.54 + 3.4 = ? (a) 9.84 (b) 6.88 (c) 9.94 (d) 10.04
  24. 24.2.91 + 6.1 = ? (a) 3.52 (b) 9.01 (c) 9.11 (d) 8.91
  25. 25.Which is the smallest: 0.785, 0.8, 0.89, 0.078? (a) 0.785 (b) 0.8 (c) 0.89 (d) 0.078
  26. 26.Which is the greatest: 0.2, 0.011, 0.21, 0.163? (a) 0.2 (b) 0.011 (c) 0.21 (d) 0.163
  27. 27.4.82 + 4.4 = ? (a) 9.12 (b) 5.26 (c) 9.22 (d) 9.32
  28. 28.What is the value of the digit 9 in 62.597? (a) 0.9 (b) 0.009 (c) 0.09 (d) 9
  29. 29.7.88 + 2.1 = ? (a) 9.98 (b) 10.08 (c) 8.09 (d) 9.88
  30. 30.2.62 + 5.4 = ? (a) 8.12 (b) 3.16 (c) 8.02 (d) 7.92
  31. 31.Which is the smallest: 0.4, 0.375, 0.42, 0.031? (a) 0.4 (b) 0.375 (c) 0.42 (d) 0.031
  32. 32.2.86 + 3.6 = ? (a) 3.22 (b) 6.56 (c) 6.36 (d) 6.46
  33. 33.4.77 + 3.6 = ? (a) 5.13 (b) 8.27 (c) 8.47 (d) 8.37
  34. 34.Which is the smallest: 0.054, 0.22, 0.125, 0.2? (a) 0.054 (b) 0.22 (c) 0.125 (d) 0.2
  35. 35.Which is the smallest: 0.098, 0.6, 0.61, 0.514? (a) 0.098 (b) 0.6 (c) 0.61 (d) 0.514
  36. 36.5.88 + 3.2 = ? (a) 8.98 (b) 9.18 (c) 9.08 (d) 6.2
  37. 37.2.51 + 8.4 = ? (a) 11.01 (b) 10.91 (c) 3.35 (d) 10.81
  38. 38.Which is the greatest: 0.778, 0.076, 0.8, 0.84? (a) 0.778 (b) 0.076 (c) 0.8 (d) 0.84
  39. 39.Which is the greatest: 0.2, 0.041, 0.24, 0.129? (a) 0.2 (b) 0.041 (c) 0.24 (d) 0.129
  40. 40.3.38 + 6.9 = ? (a) 4.07 (b) 10.38 (c) 10.18 (d) 10.28

Answer key

  1. 80
  2. 17.25
  3. 0.063
  4. 10.01
  5. 50
  6. 4.15
  7. 8.31
  8. 2.53
  9. 9.91
  10. 11.58
  11. 0.07
  12. 7
  13. 0.006
  14. 17.95
  15. 15.89
  16. 40
  17. 0.3
  18. 10.26
  19. 7.75
  20. 11.66
  21. 20
  22. 0.43
  23. 9.94
  24. 9.01
  25. 0.078
  26. 0.21
  27. 9.22
  28. 0.09
  29. 9.98
  30. 8.02
  31. 0.031
  32. 6.46
  33. 8.37
  34. 0.054
  35. 0.098
  36. 9.08
  37. 10.91
  38. 0.84
  39. 0.24
  40. 10.28

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