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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 350 · 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. 1.2.51 + 3.7 = ? (a) 6.31 (b) 6.11 (c) 6.21 (d) 2.88
  2. 2.7.71 + 4.5 = ? (a) 12.11 (b) 8.16 (c) 12.31 (d) 12.21
  3. 3.3.62 + 4.6 = ? (a) 8.22 (b) 8.32 (c) 8.12 (d) 4.08
  4. 4.What is the value of the digit 7 in 72.813? (a) 7 (b) 0.7 (c) 0.07 (d) 70
  5. 5.Which is the smallest: 0.075, 0.245, 0.37, 0.3? (a) 0.075 (b) 0.245 (c) 0.37 (d) 0.3
  6. 6.1.57 + 2.1 = ? (a) 3.57 (b) 1.78 (c) 3.77 (d) 3.67
  7. 7.What is the value of the digit 8 in 71.968? (a) 8 (b) 0.8 (c) 0.008 (d) 0.08
  8. 8.What is the value of the digit 5 in 51.376? (a) 50 (b) 0.5 (c) 5 (d) 0.05
  9. 9.What is the value of the digit 7 in 57.241? (a) 0.07 (b) 7 (c) 70 (d) 0.7
  10. 10.8.53 + 1.6 = ? (a) 10.23 (b) 10.03 (c) 8.69 (d) 10.13
  11. 11.Which is the greatest: 0.212, 0.093, 0.36, 0.3? (a) 0.212 (b) 0.093 (c) 0.36 (d) 0.3
  12. 12.2.31 + 8.7 = ? (a) 11.11 (b) 10.91 (c) 3.18 (d) 11.01
  13. 13.2.07 + 4.5 = ? (a) 6.47 (b) 6.67 (c) 6.57 (d) 2.52
  14. 14.Which is the greatest: 0.41, 0.311, 0.057, 0.4? (a) 0.41 (b) 0.311 (c) 0.057 (d) 0.4
  15. 15.6.11 + 2.3 = ? (a) 6.34 (b) 8.41 (c) 8.51 (d) 8.31
  16. 16.Which is the greatest: 0.024, 0.25, 0.2, 0.116? (a) 0.024 (b) 0.25 (c) 0.2 (d) 0.116
  17. 17.What is the value of the digit 8 in 87.451? (a) 8 (b) 0.08 (c) 0.8 (d) 80
  18. 18.3.86 + 5.1 = ? (a) 8.86 (b) 9.06 (c) 4.37 (d) 8.96
  19. 19.Which is the greatest: 0.2, 0.088, 0.123, 0.26? (a) 0.2 (b) 0.088 (c) 0.123 (d) 0.26
  20. 20.9.54 + 5.2 = ? (a) 14.64 (b) 14.84 (c) 10.06 (d) 14.74
  21. 21.8.91 + 1.3 = ? (a) 10.21 (b) 9.04 (c) 10.31 (d) 10.11
  22. 22.Which is the greatest: 0.035, 0.45, 0.335, 0.4? (a) 0.035 (b) 0.45 (c) 0.335 (d) 0.4
  23. 23.3.66 + 8.7 = ? (a) 12.26 (b) 12.46 (c) 12.36 (d) 4.53
  24. 24.Which is the greatest: 0.084, 0.158, 0.23, 0.2? (a) 0.084 (b) 0.158 (c) 0.23 (d) 0.2
  25. 25.1.55 + 5.2 = ? (a) 6.65 (b) 6.85 (c) 6.75 (d) 2.07
  26. 26.What is the value of the digit 6 in 64.978? (a) 6 (b) 60 (c) 0.6 (d) 0.06
  27. 27.Which is the greatest: 0.665, 0.74, 0.085, 0.7? (a) 0.665 (b) 0.74 (c) 0.085 (d) 0.7
  28. 28.9.71 + 1.8 = ? (a) 9.89 (b) 11.41 (c) 11.61 (d) 11.51
  29. 29.9.71 + 3.8 = ? (a) 10.09 (b) 13.41 (c) 13.61 (d) 13.51
  30. 30.4.69 + 6.4 = ? (a) 11.19 (b) 10.99 (c) 5.33 (d) 11.09
  31. 31.Which is the smallest: 0.44, 0.038, 0.397, 0.4? (a) 0.44 (b) 0.038 (c) 0.397 (d) 0.4
  32. 32.3.15 + 3.5 = ? (a) 6.75 (b) 6.55 (c) 6.65 (d) 3.5
  33. 33.What is the value of the digit 2 in 29.481? (a) 0.02 (b) 2 (c) 0.2 (d) 20
  34. 34.Which is the smallest: 0.36, 0.3, 0.061, 0.254? (a) 0.36 (b) 0.3 (c) 0.061 (d) 0.254
  35. 35.What is the value of the digit 5 in 28.635? (a) 0.005 (b) 0.5 (c) 0.05 (d) 5
  36. 36.1.74 + 5.8 = ? (a) 7.44 (b) 7.54 (c) 2.32 (d) 7.64
  37. 37.What is the value of the digit 2 in 73.824? (a) 0.02 (b) 0.002 (c) 2 (d) 0.2
  38. 38.2.91 + 2.8 = ? (a) 3.19 (b) 5.61 (c) 5.71 (d) 5.81
  39. 39.What is the value of the digit 3 in 53.472? (a) 3 (b) 0.3 (c) 0.03 (d) 30
  40. 40.What is the value of the digit 6 in 36.817? (a) 0.6 (b) 60 (c) 6 (d) 0.06

Answer key

  1. 6.21
  2. 12.21
  3. 8.22
  4. 70
  5. 0.075
  6. 3.67
  7. 0.008
  8. 50
  9. 7
  10. 10.13
  11. 0.36
  12. 11.01
  13. 6.57
  14. 0.41
  15. 8.41
  16. 0.25
  17. 80
  18. 8.96
  19. 0.26
  20. 14.74
  21. 10.21
  22. 0.45
  23. 12.36
  24. 0.23
  25. 6.75
  26. 60
  27. 0.74
  28. 11.51
  29. 13.51
  30. 11.09
  31. 0.038
  32. 6.65
  33. 20
  34. 0.061
  35. 0.005
  36. 7.54
  37. 0.02
  38. 5.71
  39. 3
  40. 6

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