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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 985 · 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 78.429? (a) 80 (b) 0.08 (c) 0.8 (d) 8
  2. 2.9.84 + 1.2 = ? (a) 10.94 (b) 9.96 (c) 11.04 (d) 11.14
  3. 3.2.35 + 6.5 = ? (a) 8.75 (b) 8.85 (c) 8.95 (d) 3
  4. 4.Which is the smallest: 0.82, 0.729, 0.049, 0.8? (a) 0.82 (b) 0.729 (c) 0.049 (d) 0.8
  5. 5.What is the value of the digit 3 in 53.146? (a) 30 (b) 0.3 (c) 0.03 (d) 3
  6. 6.4.06 + 5.4 = ? (a) 4.6 (b) 9.56 (c) 9.46 (d) 9.36
  7. 7.2.19 + 8.8 = ? (a) 3.07 (b) 11.09 (c) 10.89 (d) 10.99
  8. 8.4.41 + 1.8 = ? (a) 4.59 (b) 6.31 (c) 6.11 (d) 6.21
  9. 9.Which is the smallest: 0.6, 0.69, 0.083, 0.599? (a) 0.6 (b) 0.69 (c) 0.083 (d) 0.599
  10. 10.Which is the smallest: 0.6, 0.549, 0.65, 0.088? (a) 0.6 (b) 0.549 (c) 0.65 (d) 0.088
  11. 11.Which is the smallest: 0.36, 0.211, 0.075, 0.3? (a) 0.36 (b) 0.211 (c) 0.075 (d) 0.3
  12. 12.3.96 + 7.5 = ? (a) 11.36 (b) 4.71 (c) 11.56 (d) 11.46
  13. 13.What is the value of the digit 9 in 67.291? (a) 0.9 (b) 9 (c) 0.009 (d) 0.09
  14. 14.6.14 + 2.9 = ? (a) 8.94 (b) 6.43 (c) 9.14 (d) 9.04
  15. 15.What is the value of the digit 1 in 82.317? (a) 0.001 (b) 0.1 (c) 1 (d) 0.01
  16. 16.What is the value of the digit 2 in 23.914? (a) 0.02 (b) 0.2 (c) 20 (d) 2
  17. 17.What is the value of the digit 9 in 23.894? (a) 0.9 (b) 9 (c) 0.009 (d) 0.09
  18. 18.Which is the greatest: 0.4, 0.45, 0.352, 0.035? (a) 0.4 (b) 0.45 (c) 0.352 (d) 0.035
  19. 19.Which is the smallest: 0.7, 0.697, 0.057, 0.76? (a) 0.7 (b) 0.697 (c) 0.057 (d) 0.76
  20. 20.What is the value of the digit 4 in 41.265? (a) 0.4 (b) 0.04 (c) 4 (d) 40
  21. 21.Which is the smallest: 0.52, 0.485, 0.057, 0.5? (a) 0.52 (b) 0.485 (c) 0.057 (d) 0.5
  22. 22.9.21 + 4.9 = ? (a) 14.21 (b) 14.11 (c) 9.7 (d) 14.01
  23. 23.Which is the greatest: 0.099, 0.129, 0.29, 0.2? (a) 0.099 (b) 0.129 (c) 0.29 (d) 0.2
  24. 24.1.11 + 4.3 = ? (a) 5.51 (b) 5.31 (c) 1.54 (d) 5.41
  25. 25.What is the value of the digit 8 in 37.586? (a) 0.08 (b) 0.8 (c) 0.008 (d) 8
  26. 26.Which is the greatest: 0.73, 0.649, 0.7, 0.086? (a) 0.73 (b) 0.649 (c) 0.7 (d) 0.086
  27. 27.What is the value of the digit 7 in 27.934? (a) 7 (b) 0.07 (c) 70 (d) 0.7
  28. 28.What is the value of the digit 8 in 89.143? (a) 80 (b) 0.8 (c) 8 (d) 0.08
  29. 29.Which is the smallest: 0.064, 0.77, 0.7, 0.679? (a) 0.064 (b) 0.77 (c) 0.7 (d) 0.679
  30. 30.Which is the smallest: 0.028, 0.617, 0.71, 0.7? (a) 0.028 (b) 0.617 (c) 0.71 (d) 0.7
  31. 31.What is the value of the digit 9 in 23.497? (a) 0.09 (b) 0.009 (c) 9 (d) 0.9
  32. 32.What is the value of the digit 4 in 62.439? (a) 0.04 (b) 4 (c) 0.004 (d) 0.4
  33. 33.What is the value of the digit 6 in 65.423? (a) 0.06 (b) 0.6 (c) 60 (d) 6
  34. 34.Which is the greatest: 0.74, 0.691, 0.7, 0.092? (a) 0.74 (b) 0.691 (c) 0.7 (d) 0.092
  35. 35.7.22 + 6.3 = ? (a) 13.52 (b) 7.85 (c) 13.62 (d) 13.42
  36. 36.8.85 + 8.7 = ? (a) 17.65 (b) 17.45 (c) 9.72 (d) 17.55
  37. 37.Which is the smallest: 0.054, 0.3, 0.36, 0.268? (a) 0.054 (b) 0.3 (c) 0.36 (d) 0.268
  38. 38.3.55 + 3.7 = ? (a) 7.35 (b) 7.15 (c) 3.92 (d) 7.25
  39. 39.4.39 + 8.7 = ? (a) 13.09 (b) 5.26 (c) 12.99 (d) 13.19
  40. 40.3.87 + 6.8 = ? (a) 10.57 (b) 4.55 (c) 10.77 (d) 10.67

Answer key

  1. 8
  2. 11.04
  3. 8.85
  4. 0.049
  5. 3
  6. 9.46
  7. 10.99
  8. 6.21
  9. 0.083
  10. 0.088
  11. 0.075
  12. 11.46
  13. 0.09
  14. 9.04
  15. 0.01
  16. 20
  17. 0.09
  18. 0.45
  19. 0.057
  20. 40
  21. 0.057
  22. 14.11
  23. 0.29
  24. 5.41
  25. 0.08
  26. 0.73
  27. 7
  28. 80
  29. 0.064
  30. 0.028
  31. 0.09
  32. 0.4
  33. 60
  34. 0.74
  35. 13.52
  36. 17.55
  37. 0.054
  38. 7.25
  39. 13.09
  40. 10.67

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