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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 344 · 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. 1.6.21 + 2.7 = ? (a) 8.81 (b) 9.01 (c) 8.91 (d) 6.48
  2. 2.9.66 + 8.5 = ? (a) 18.06 (b) 18.16 (c) 10.51 (d) 18.26
  3. 3.Which is the smallest: 0.75, 0.083, 0.666, 0.7? (a) 0.75 (b) 0.083 (c) 0.666 (d) 0.7
  4. 4.Which is the greatest: 0.2, 0.173, 0.098, 0.27? (a) 0.2 (b) 0.173 (c) 0.098 (d) 0.27
  5. 5.What is the value of the digit 5 in 14.597? (a) 0.5 (b) 5 (c) 0.005 (d) 0.05
  6. 6.What is the value of the digit 2 in 74.213? (a) 0.02 (b) 2 (c) 0.002 (d) 0.2
  7. 7.Which is the greatest: 0.5, 0.446, 0.55, 0.045? (a) 0.5 (b) 0.446 (c) 0.55 (d) 0.045
  8. 8.6.49 + 2.3 = ? (a) 8.89 (b) 8.79 (c) 8.69 (d) 6.72
  9. 9.Which is the smallest: 0.4, 0.353, 0.073, 0.44? (a) 0.4 (b) 0.353 (c) 0.073 (d) 0.44
  10. 10.What is the value of the digit 3 in 16.347? (a) 0.003 (b) 3 (c) 0.03 (d) 0.3
  11. 11.2.81 + 4.6 = ? (a) 7.41 (b) 7.31 (c) 7.51 (d) 3.27
  12. 12.What is the value of the digit 4 in 95.342? (a) 0.4 (b) 4 (c) 0.004 (d) 0.04
  13. 13.Which is the smallest: 0.7, 0.071, 0.76, 0.625? (a) 0.7 (b) 0.071 (c) 0.76 (d) 0.625
  14. 14.What is the value of the digit 1 in 91.478? (a) 0.01 (b) 1 (c) 0.1 (d) 10
  15. 15.5.78 + 4.5 = ? (a) 10.18 (b) 6.23 (c) 10.28 (d) 10.38
  16. 16.6.41 + 1.2 = ? (a) 6.53 (b) 7.71 (c) 7.61 (d) 7.51
  17. 17.What is the value of the digit 8 in 49.178? (a) 0.8 (b) 0.008 (c) 8 (d) 0.08
  18. 18.What is the value of the digit 4 in 12.487? (a) 0.04 (b) 0.004 (c) 4 (d) 0.4
  19. 19.Which is the smallest: 0.462, 0.52, 0.5, 0.015? (a) 0.462 (b) 0.52 (c) 0.5 (d) 0.015
  20. 20.Which is the smallest: 0.2, 0.086, 0.126, 0.24? (a) 0.2 (b) 0.086 (c) 0.126 (d) 0.24
  21. 21.Which is the greatest: 0.5, 0.053, 0.56, 0.496? (a) 0.5 (b) 0.053 (c) 0.56 (d) 0.496
  22. 22.What is the value of the digit 2 in 83.625? (a) 0.2 (b) 0.02 (c) 2 (d) 0.002
  23. 23.3.58 + 2.8 = ? (a) 6.38 (b) 3.86 (c) 6.28 (d) 6.48
  24. 24.What is the value of the digit 1 in 34.512? (a) 0.01 (b) 0.1 (c) 0.001 (d) 1
  25. 25.Which is the greatest: 0.58, 0.486, 0.075, 0.5? (a) 0.58 (b) 0.486 (c) 0.075 (d) 0.5
  26. 26.What is the value of the digit 1 in 95.412? (a) 0.01 (b) 0.001 (c) 0.1 (d) 1
  27. 27.Which is the smallest: 0.3, 0.237, 0.32, 0.034? (a) 0.3 (b) 0.237 (c) 0.32 (d) 0.034
  28. 28.1.35 + 2.4 = ? (a) 3.75 (b) 3.85 (c) 3.65 (d) 1.59
  29. 29.What is the value of the digit 7 in 74.651? (a) 70 (b) 0.07 (c) 0.7 (d) 7
  30. 30.5.11 + 5.1 = ? (a) 10.31 (b) 10.21 (c) 10.11 (d) 5.62
  31. 31.Which is the greatest: 0.29, 0.047, 0.179, 0.2? (a) 0.29 (b) 0.047 (c) 0.179 (d) 0.2
  32. 32.5.07 + 4.9 = ? (a) 9.87 (b) 10.07 (c) 9.97 (d) 5.56
  33. 33.What is the value of the digit 1 in 65.821? (a) 0.001 (b) 0.01 (c) 1 (d) 0.1
  34. 34.What is the value of the digit 4 in 24.895? (a) 40 (b) 0.4 (c) 0.04 (d) 4
  35. 35.What is the value of the digit 8 in 86.749? (a) 0.8 (b) 0.08 (c) 80 (d) 8
  36. 36.Which is the smallest: 0.122, 0.043, 0.21, 0.2? (a) 0.122 (b) 0.043 (c) 0.21 (d) 0.2
  37. 37.Which is the greatest: 0.079, 0.76, 0.7, 0.628? (a) 0.079 (b) 0.76 (c) 0.7 (d) 0.628
  38. 38.1.08 + 8.4 = ? (a) 9.58 (b) 1.92 (c) 9.48 (d) 9.38
  39. 39.What is the value of the digit 5 in 58.123? (a) 0.5 (b) 5 (c) 50 (d) 0.05
  40. 40.9.98 + 7.5 = ? (a) 10.73 (b) 17.58 (c) 17.48 (d) 17.38

Answer key

  1. 8.91
  2. 18.16
  3. 0.083
  4. 0.27
  5. 0.5
  6. 0.2
  7. 0.55
  8. 8.79
  9. 0.073
  10. 0.3
  11. 7.41
  12. 0.04
  13. 0.071
  14. 1
  15. 10.28
  16. 7.61
  17. 0.008
  18. 0.4
  19. 0.015
  20. 0.086
  21. 0.56
  22. 0.02
  23. 6.38
  24. 0.01
  25. 0.58
  26. 0.01
  27. 0.034
  28. 3.75
  29. 70
  30. 10.21
  31. 0.29
  32. 9.97
  33. 0.001
  34. 4
  35. 80
  36. 0.043
  37. 0.76
  38. 9.48
  39. 50
  40. 17.48

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