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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 623 · 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. 1.4.52 + 2.8 = ? (a) 4.8 (b) 7.22 (c) 7.42 (d) 7.32
  2. 2.Which is the greatest: 0.38, 0.098, 0.3, 0.246? (a) 0.38 (b) 0.098 (c) 0.3 (d) 0.246
  3. 3.6.55 + 2.3 = ? (a) 8.75 (b) 8.85 (c) 8.95 (d) 6.78
  4. 4.Which is the smallest: 0.7, 0.623, 0.78, 0.058? (a) 0.7 (b) 0.623 (c) 0.78 (d) 0.058
  5. 5.What is the value of the digit 8 in 26.398? (a) 0.08 (b) 8 (c) 0.008 (d) 0.8
  6. 6.5.97 + 7.9 = ? (a) 13.97 (b) 6.76 (c) 13.77 (d) 13.87
  7. 7.What is the value of the digit 1 in 31.759? (a) 0.1 (b) 1 (c) 0.01 (d) 10
  8. 8.Which is the smallest: 0.77, 0.7, 0.684, 0.097? (a) 0.77 (b) 0.7 (c) 0.684 (d) 0.097
  9. 9.Which is the greatest: 0.41, 0.351, 0.4, 0.071? (a) 0.41 (b) 0.351 (c) 0.4 (d) 0.071
  10. 10.What is the value of the digit 5 in 92.541? (a) 5 (b) 0.5 (c) 0.005 (d) 0.05
  11. 11.What is the value of the digit 5 in 19.756? (a) 0.005 (b) 5 (c) 0.5 (d) 0.05
  12. 12.Which is the greatest: 0.45, 0.387, 0.069, 0.4? (a) 0.45 (b) 0.387 (c) 0.069 (d) 0.4
  13. 13.Which is the greatest: 0.098, 0.79, 0.635, 0.7? (a) 0.098 (b) 0.79 (c) 0.635 (d) 0.7
  14. 14.7.21 + 1.6 = ? (a) 7.37 (b) 8.91 (c) 8.71 (d) 8.81
  15. 15.What is the value of the digit 3 in 16.453? (a) 0.3 (b) 3 (c) 0.003 (d) 0.03
  16. 16.3.78 + 8.1 = ? (a) 4.59 (b) 11.98 (c) 11.78 (d) 11.88
  17. 17.Which is the smallest: 0.3, 0.223, 0.35, 0.023? (a) 0.3 (b) 0.223 (c) 0.35 (d) 0.023
  18. 18.Which is the greatest: 0.318, 0.4, 0.063, 0.49? (a) 0.318 (b) 0.4 (c) 0.063 (d) 0.49
  19. 19.Which is the smallest: 0.24, 0.136, 0.076, 0.2? (a) 0.24 (b) 0.136 (c) 0.076 (d) 0.2
  20. 20.8.82 + 4.8 = ? (a) 13.52 (b) 9.3 (c) 13.62 (d) 13.72
  21. 21.4.42 + 1.7 = ? (a) 6.02 (b) 4.59 (c) 6.12 (d) 6.22
  22. 22.6.69 + 3.5 = ? (a) 10.19 (b) 10.29 (c) 7.04 (d) 10.09
  23. 23.3.81 + 8.1 = ? (a) 11.91 (b) 12.01 (c) 11.81 (d) 4.62
  24. 24.What is the value of the digit 3 in 43.568? (a) 0.03 (b) 0.3 (c) 30 (d) 3
  25. 25.5.74 + 3.9 = ? (a) 9.54 (b) 6.13 (c) 9.64 (d) 9.74
  26. 26.2.21 + 4.3 = ? (a) 6.41 (b) 6.61 (c) 2.64 (d) 6.51
  27. 27.Which is the greatest: 0.73, 0.636, 0.054, 0.7? (a) 0.73 (b) 0.636 (c) 0.054 (d) 0.7
  28. 28.1.32 + 9.1 = ? (a) 2.23 (b) 10.52 (c) 10.32 (d) 10.42
  29. 29.9.96 + 7.1 = ? (a) 17.06 (b) 10.67 (c) 17.16 (d) 16.96
  30. 30.3.58 + 7.1 = ? (a) 4.29 (b) 10.58 (c) 10.78 (d) 10.68
  31. 31.What is the value of the digit 6 in 91.768? (a) 0.006 (b) 0.06 (c) 0.6 (d) 6
  32. 32.What is the value of the digit 8 in 98.253? (a) 0.8 (b) 8 (c) 80 (d) 0.08
  33. 33.Which is the greatest: 0.295, 0.031, 0.3, 0.36? (a) 0.295 (b) 0.031 (c) 0.3 (d) 0.36
  34. 34.6.09 + 4.4 = ? (a) 10.39 (b) 10.49 (c) 6.53 (d) 10.59
  35. 35.Which is the smallest: 0.122, 0.26, 0.2, 0.059? (a) 0.122 (b) 0.26 (c) 0.2 (d) 0.059
  36. 36.Which is the greatest: 0.058, 0.5, 0.53, 0.481? (a) 0.058 (b) 0.5 (c) 0.53 (d) 0.481
  37. 37.Which is the greatest: 0.079, 0.75, 0.7, 0.686? (a) 0.079 (b) 0.75 (c) 0.7 (d) 0.686
  38. 38.What is the value of the digit 6 in 68.932? (a) 0.6 (b) 0.06 (c) 6 (d) 60
  39. 39.What is the value of the digit 2 in 51.327? (a) 0.2 (b) 0.02 (c) 0.002 (d) 2
  40. 40.1.62 + 2.1 = ? (a) 3.62 (b) 3.82 (c) 1.83 (d) 3.72

Answer key

  1. 7.32
  2. 0.38
  3. 8.85
  4. 0.058
  5. 0.008
  6. 13.87
  7. 1
  8. 0.097
  9. 0.41
  10. 0.5
  11. 0.05
  12. 0.45
  13. 0.79
  14. 8.81
  15. 0.003
  16. 11.88
  17. 0.023
  18. 0.49
  19. 0.076
  20. 13.62
  21. 6.12
  22. 10.19
  23. 11.91
  24. 3
  25. 9.64
  26. 6.51
  27. 0.73
  28. 10.42
  29. 17.06
  30. 10.68
  31. 0.06
  32. 8
  33. 0.36
  34. 10.49
  35. 0.059
  36. 0.53
  37. 0.75
  38. 60
  39. 0.02
  40. 3.72

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