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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 210 · 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. 1.3.91 + 2.1 = ? (a) 6.01 (b) 5.91 (c) 6.11 (d) 4.12
  2. 2.3.51 + 7.9 = ? (a) 11.41 (b) 11.31 (c) 4.3 (d) 11.51
  3. 3.Which is the greatest: 0.031, 0.3, 0.39, 0.275? (a) 0.031 (b) 0.3 (c) 0.39 (d) 0.275
  4. 4.What is the value of the digit 7 in 27.951? (a) 0.7 (b) 70 (c) 0.07 (d) 7
  5. 5.What is the value of the digit 2 in 52.418? (a) 2 (b) 0.2 (c) 0.02 (d) 20
  6. 6.9.68 + 2.8 = ? (a) 12.58 (b) 12.48 (c) 9.96 (d) 12.38
  7. 7.6.26 + 8.3 = ? (a) 14.66 (b) 14.56 (c) 14.46 (d) 7.09
  8. 8.What is the value of the digit 1 in 91.237? (a) 10 (b) 1 (c) 0.1 (d) 0.01
  9. 9.What is the value of the digit 9 in 23.978? (a) 0.09 (b) 9 (c) 0.9 (d) 0.009
  10. 10.1.62 + 8.5 = ? (a) 10.22 (b) 10.12 (c) 2.47 (d) 10.02
  11. 11.What is the value of the digit 3 in 98.137? (a) 3 (b) 0.003 (c) 0.03 (d) 0.3
  12. 12.Which is the smallest: 0.017, 0.7, 0.75, 0.671? (a) 0.017 (b) 0.7 (c) 0.75 (d) 0.671
  13. 13.Which is the smallest: 0.24, 0.025, 0.151, 0.2? (a) 0.24 (b) 0.025 (c) 0.151 (d) 0.2
  14. 14.Which is the greatest: 0.166, 0.29, 0.011, 0.2? (a) 0.166 (b) 0.29 (c) 0.011 (d) 0.2
  15. 15.9.68 + 8.1 = ? (a) 10.49 (b) 17.88 (c) 17.68 (d) 17.78
  16. 16.Which is the smallest: 0.062, 0.348, 0.4, 0.42? (a) 0.062 (b) 0.348 (c) 0.4 (d) 0.42
  17. 17.7.51 + 6.9 = ? (a) 14.31 (b) 8.2 (c) 14.41 (d) 14.51
  18. 18.Which is the greatest: 0.328, 0.023, 0.44, 0.4? (a) 0.328 (b) 0.023 (c) 0.44 (d) 0.4
  19. 19.5.53 + 8.8 = ? (a) 14.33 (b) 6.41 (c) 14.23 (d) 14.43
  20. 20.5.51 + 2.8 = ? (a) 8.41 (b) 8.21 (c) 5.79 (d) 8.31
  21. 21.2.51 + 2.7 = ? (a) 5.31 (b) 2.78 (c) 5.21 (d) 5.11
  22. 22.4.41 + 1.4 = ? (a) 5.71 (b) 5.81 (c) 4.55 (d) 5.91
  23. 23.What is the value of the digit 4 in 32.416? (a) 0.4 (b) 4 (c) 0.004 (d) 0.04
  24. 24.What is the value of the digit 1 in 13.678? (a) 1 (b) 0.1 (c) 0.01 (d) 10
  25. 25.Which is the smallest: 0.047, 0.6, 0.67, 0.513? (a) 0.047 (b) 0.6 (c) 0.67 (d) 0.513
  26. 26.Which is the smallest: 0.6, 0.68, 0.032, 0.577? (a) 0.6 (b) 0.68 (c) 0.032 (d) 0.577
  27. 27.9.03 + 4.9 = ? (a) 13.83 (b) 14.03 (c) 9.52 (d) 13.93
  28. 28.5.66 + 2.5 = ? (a) 5.91 (b) 8.16 (c) 8.06 (d) 8.26
  29. 29.8.46 + 2.6 = ? (a) 10.96 (b) 11.16 (c) 8.72 (d) 11.06
  30. 30.3.01 + 6.9 = ? (a) 9.91 (b) 3.7 (c) 9.81 (d) 10.01
  31. 31.1.98 + 7.9 = ? (a) 9.88 (b) 2.77 (c) 9.78 (d) 9.98
  32. 32.8.65 + 1.6 = ? (a) 10.15 (b) 10.35 (c) 10.25 (d) 8.81
  33. 33.3.18 + 5.5 = ? (a) 8.78 (b) 3.73 (c) 8.68 (d) 8.58
  34. 34.Which is the smallest: 0.626, 0.73, 0.069, 0.7? (a) 0.626 (b) 0.73 (c) 0.069 (d) 0.7
  35. 35.What is the value of the digit 3 in 45.793? (a) 3 (b) 0.003 (c) 0.03 (d) 0.3
  36. 36.7.79 + 1.5 = ? (a) 7.94 (b) 9.29 (c) 9.39 (d) 9.19
  37. 37.3.71 + 1.6 = ? (a) 5.31 (b) 5.21 (c) 3.87 (d) 5.41
  38. 38.3.28 + 1.3 = ? (a) 3.41 (b) 4.68 (c) 4.48 (d) 4.58
  39. 39.What is the value of the digit 9 in 15.429? (a) 0.009 (b) 9 (c) 0.09 (d) 0.9
  40. 40.Which is the greatest: 0.343, 0.4, 0.43, 0.071? (a) 0.343 (b) 0.4 (c) 0.43 (d) 0.071

Answer key

  1. 6.01
  2. 11.41
  3. 0.39
  4. 7
  5. 2
  6. 12.48
  7. 14.56
  8. 1
  9. 0.9
  10. 10.12
  11. 0.03
  12. 0.017
  13. 0.025
  14. 0.29
  15. 17.78
  16. 0.062
  17. 14.41
  18. 0.44
  19. 14.33
  20. 8.31
  21. 5.21
  22. 5.81
  23. 0.4
  24. 10
  25. 0.047
  26. 0.032
  27. 13.93
  28. 8.16
  29. 11.06
  30. 9.91
  31. 9.88
  32. 10.25
  33. 8.68
  34. 0.069
  35. 0.003
  36. 9.29
  37. 5.31
  38. 4.58
  39. 0.009
  40. 0.43

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