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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 806 · 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. 1.4.07 + 1.1 = ? (a) 4.18 (b) 5.07 (c) 5.17 (d) 5.27
  2. 2.8.71 + 2.8 = ? (a) 11.61 (b) 8.99 (c) 11.51 (d) 11.41
  3. 3.Which is the smallest: 0.4, 0.45, 0.025, 0.383? (a) 0.4 (b) 0.45 (c) 0.025 (d) 0.383
  4. 4.Which is the smallest: 0.475, 0.043, 0.5, 0.56? (a) 0.475 (b) 0.043 (c) 0.5 (d) 0.56
  5. 5.What is the value of the digit 3 in 17.396? (a) 0.03 (b) 3 (c) 0.003 (d) 0.3
  6. 6.What is the value of the digit 7 in 27.861? (a) 0.7 (b) 0.07 (c) 70 (d) 7
  7. 7.4.66 + 3.2 = ? (a) 7.76 (b) 7.96 (c) 4.98 (d) 7.86
  8. 8.What is the value of the digit 7 in 18.739? (a) 0.7 (b) 0.007 (c) 7 (d) 0.07
  9. 9.What is the value of the digit 4 in 39.542? (a) 0.4 (b) 4 (c) 0.04 (d) 0.004
  10. 10.Which is the greatest: 0.7, 0.647, 0.72, 0.022? (a) 0.7 (b) 0.647 (c) 0.72 (d) 0.022
  11. 11.Which is the greatest: 0.31, 0.3, 0.214, 0.096? (a) 0.31 (b) 0.3 (c) 0.214 (d) 0.096
  12. 12.4.61 + 7.1 = ? (a) 11.61 (b) 11.71 (c) 11.81 (d) 5.32
  13. 13.What is the value of the digit 9 in 36.129? (a) 0.09 (b) 9 (c) 0.9 (d) 0.009
  14. 14.8.03 + 3.1 = ? (a) 11.13 (b) 11.03 (c) 11.23 (d) 8.34
  15. 15.7.74 + 9.5 = ? (a) 17.34 (b) 8.69 (c) 17.24 (d) 17.14
  16. 16.2.23 + 2.5 = ? (a) 4.73 (b) 2.48 (c) 4.63 (d) 4.83
  17. 17.6.97 + 2.1 = ? (a) 9.17 (b) 8.97 (c) 7.18 (d) 9.07
  18. 18.2.95 + 4.2 = ? (a) 7.25 (b) 7.15 (c) 7.05 (d) 3.37
  19. 19.Which is the smallest: 0.052, 0.434, 0.5, 0.56? (a) 0.052 (b) 0.434 (c) 0.5 (d) 0.56
  20. 20.Which is the smallest: 0.094, 0.4, 0.41, 0.315? (a) 0.094 (b) 0.4 (c) 0.41 (d) 0.315
  21. 21.7.97 + 1.9 = ? (a) 9.87 (b) 8.16 (c) 9.97 (d) 9.77
  22. 22.What is the value of the digit 5 in 75.364? (a) 50 (b) 5 (c) 0.05 (d) 0.5
  23. 23.4.74 + 8.1 = ? (a) 5.55 (b) 12.84 (c) 12.94 (d) 12.74
  24. 24.What is the value of the digit 2 in 82.561? (a) 20 (b) 2 (c) 0.2 (d) 0.02
  25. 25.6.81 + 1.2 = ? (a) 8.11 (b) 6.93 (c) 8.01 (d) 7.91
  26. 26.7.02 + 6.5 = ? (a) 13.52 (b) 13.62 (c) 7.67 (d) 13.42
  27. 27.What is the value of the digit 1 in 61.524? (a) 1 (b) 0.1 (c) 10 (d) 0.01
  28. 28.Which is the smallest: 0.515, 0.69, 0.034, 0.6? (a) 0.515 (b) 0.69 (c) 0.034 (d) 0.6
  29. 29.Which is the smallest: 0.222, 0.091, 0.33, 0.3? (a) 0.222 (b) 0.091 (c) 0.33 (d) 0.3
  30. 30.Which is the greatest: 0.137, 0.032, 0.27, 0.2? (a) 0.137 (b) 0.032 (c) 0.27 (d) 0.2
  31. 31.Which is the greatest: 0.7, 0.026, 0.637, 0.71? (a) 0.7 (b) 0.026 (c) 0.637 (d) 0.71
  32. 32.What is the value of the digit 5 in 63.854? (a) 5 (b) 0.005 (c) 0.05 (d) 0.5
  33. 33.Which is the smallest: 0.88, 0.046, 0.8, 0.758? (a) 0.88 (b) 0.046 (c) 0.8 (d) 0.758
  34. 34.Which is the smallest: 0.31, 0.3, 0.044, 0.271? (a) 0.31 (b) 0.3 (c) 0.044 (d) 0.271
  35. 35.5.15 + 1.6 = ? (a) 6.65 (b) 6.85 (c) 5.31 (d) 6.75
  36. 36.Which is the smallest: 0.2, 0.048, 0.21, 0.164? (a) 0.2 (b) 0.048 (c) 0.21 (d) 0.164
  37. 37.Which is the smallest: 0.591, 0.66, 0.6, 0.032? (a) 0.591 (b) 0.66 (c) 0.6 (d) 0.032
  38. 38.1.58 + 9.7 = ? (a) 11.18 (b) 11.28 (c) 11.38 (d) 2.55
  39. 39.9.97 + 6.4 = ? (a) 16.27 (b) 16.37 (c) 10.61 (d) 16.47
  40. 40.9.31 + 6.3 = ? (a) 9.94 (b) 15.61 (c) 15.71 (d) 15.51

Answer key

  1. 5.17
  2. 11.51
  3. 0.025
  4. 0.043
  5. 0.3
  6. 7
  7. 7.86
  8. 0.7
  9. 0.04
  10. 0.72
  11. 0.31
  12. 11.71
  13. 0.009
  14. 11.13
  15. 17.24
  16. 4.73
  17. 9.07
  18. 7.15
  19. 0.052
  20. 0.094
  21. 9.87
  22. 5
  23. 12.84
  24. 2
  25. 8.01
  26. 13.52
  27. 1
  28. 0.034
  29. 0.091
  30. 0.27
  31. 0.71
  32. 0.05
  33. 0.046
  34. 0.044
  35. 6.75
  36. 0.048
  37. 0.032
  38. 11.28
  39. 16.37
  40. 15.61

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