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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 27 · 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. 1.1.37 + 4.2 = ? (a) 5.57 (b) 1.79 (c) 5.67 (d) 5.47
  2. 2.3.44 + 6.6 = ? (a) 10.04 (b) 4.1 (c) 10.14 (d) 9.94
  3. 3.Which is the smallest: 0.355, 0.099, 0.47, 0.4? (a) 0.355 (b) 0.099 (c) 0.47 (d) 0.4
  4. 4.What is the value of the digit 8 in 45.683? (a) 0.008 (b) 0.08 (c) 0.8 (d) 8
  5. 5.Which is the smallest: 0.55, 0.017, 0.5, 0.419? (a) 0.55 (b) 0.017 (c) 0.5 (d) 0.419
  6. 6.Which is the greatest: 0.23, 0.2, 0.036, 0.182? (a) 0.23 (b) 0.2 (c) 0.036 (d) 0.182
  7. 7.2.28 + 4.1 = ? (a) 2.69 (b) 6.38 (c) 6.28 (d) 6.48
  8. 8.Which is the greatest: 0.395, 0.085, 0.44, 0.4? (a) 0.395 (b) 0.085 (c) 0.44 (d) 0.4
  9. 9.What is the value of the digit 5 in 51.632? (a) 5 (b) 50 (c) 0.5 (d) 0.05
  10. 10.8.77 + 2.4 = ? (a) 11.07 (b) 11.27 (c) 9.01 (d) 11.17
  11. 11.5.55 + 4.8 = ? (a) 10.35 (b) 6.03 (c) 10.45 (d) 10.25
  12. 12.Which is the smallest: 0.021, 0.412, 0.5, 0.52? (a) 0.021 (b) 0.412 (c) 0.5 (d) 0.52
  13. 13.Which is the greatest: 0.319, 0.49, 0.073, 0.4? (a) 0.319 (b) 0.49 (c) 0.073 (d) 0.4
  14. 14.Which is the greatest: 0.6, 0.65, 0.023, 0.554? (a) 0.6 (b) 0.65 (c) 0.023 (d) 0.554
  15. 15.What is the value of the digit 3 in 76.359? (a) 0.03 (b) 3 (c) 0.3 (d) 0.003
  16. 16.What is the value of the digit 7 in 79.158? (a) 70 (b) 0.07 (c) 0.7 (d) 7
  17. 17.What is the value of the digit 3 in 36.748? (a) 0.03 (b) 3 (c) 30 (d) 0.3
  18. 18.What is the value of the digit 7 in 16.724? (a) 0.07 (b) 7 (c) 0.007 (d) 0.7
  19. 19.What is the value of the digit 1 in 16.283? (a) 0.1 (b) 1 (c) 10 (d) 0.01
  20. 20.Which is the smallest: 0.85, 0.022, 0.8, 0.716? (a) 0.85 (b) 0.022 (c) 0.8 (d) 0.716
  21. 21.9.67 + 8.1 = ? (a) 17.87 (b) 17.77 (c) 10.48 (d) 17.67
  22. 22.2.51 + 7.3 = ? (a) 3.24 (b) 9.91 (c) 9.81 (d) 9.71
  23. 23.Which is the greatest: 0.72, 0.7, 0.663, 0.015? (a) 0.72 (b) 0.7 (c) 0.663 (d) 0.015
  24. 24.Which is the greatest: 0.037, 0.6, 0.69, 0.552? (a) 0.037 (b) 0.6 (c) 0.69 (d) 0.552
  25. 25.4.12 + 4.9 = ? (a) 9.12 (b) 4.61 (c) 8.92 (d) 9.02
  26. 26.Which is the smallest: 0.4, 0.349, 0.078, 0.47? (a) 0.4 (b) 0.349 (c) 0.078 (d) 0.47
  27. 27.3.03 + 5.3 = ? (a) 8.43 (b) 3.56 (c) 8.23 (d) 8.33
  28. 28.Which is the smallest: 0.7, 0.676, 0.72, 0.043? (a) 0.7 (b) 0.676 (c) 0.72 (d) 0.043
  29. 29.7.94 + 2.4 = ? (a) 8.18 (b) 10.24 (c) 10.44 (d) 10.34
  30. 30.What is the value of the digit 8 in 29.873? (a) 0.008 (b) 0.8 (c) 0.08 (d) 8
  31. 31.Which is the greatest: 0.546, 0.61, 0.6, 0.071? (a) 0.546 (b) 0.61 (c) 0.6 (d) 0.071
  32. 32.Which is the greatest: 0.174, 0.077, 0.2, 0.29? (a) 0.174 (b) 0.077 (c) 0.2 (d) 0.29
  33. 33.2.34 + 3.7 = ? (a) 6.04 (b) 6.14 (c) 5.94 (d) 2.71
  34. 34.Which is the greatest: 0.486, 0.51, 0.5, 0.081? (a) 0.486 (b) 0.51 (c) 0.5 (d) 0.081
  35. 35.4.89 + 8.1 = ? (a) 12.99 (b) 12.89 (c) 13.09 (d) 5.7
  36. 36.Which is the smallest: 0.097, 0.74, 0.7, 0.692? (a) 0.097 (b) 0.74 (c) 0.7 (d) 0.692
  37. 37.5.31 + 9.6 = ? (a) 14.91 (b) 15.01 (c) 6.27 (d) 14.81
  38. 38.Which is the greatest: 0.643, 0.049, 0.7, 0.79? (a) 0.643 (b) 0.049 (c) 0.7 (d) 0.79
  39. 39.What is the value of the digit 9 in 63.489? (a) 9 (b) 0.9 (c) 0.09 (d) 0.009
  40. 40.4.81 + 1.5 = ? (a) 6.31 (b) 6.21 (c) 4.96 (d) 6.41

Answer key

  1. 5.57
  2. 10.04
  3. 0.099
  4. 0.08
  5. 0.017
  6. 0.23
  7. 6.38
  8. 0.44
  9. 50
  10. 11.17
  11. 10.35
  12. 0.021
  13. 0.49
  14. 0.65
  15. 0.3
  16. 70
  17. 30
  18. 0.7
  19. 10
  20. 0.022
  21. 17.77
  22. 9.81
  23. 0.72
  24. 0.69
  25. 9.02
  26. 0.078
  27. 8.33
  28. 0.043
  29. 10.34
  30. 0.8
  31. 0.61
  32. 0.29
  33. 6.04
  34. 0.51
  35. 12.99
  36. 0.097
  37. 14.91
  38. 0.79
  39. 0.009
  40. 6.31

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