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Decimals Worksheet for Maths Olympiad Class 5

Maths Olympiad topic 10: Decimals and place value · Set 123 · 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. 1.3.49 + 4.7 = ? (a) 3.96 (b) 8.19 (c) 8.29 (d) 8.09
  2. 2.Which is the greatest: 0.3, 0.097, 0.32, 0.286? (a) 0.3 (b) 0.097 (c) 0.32 (d) 0.286
  3. 3.Which is the greatest: 0.61, 0.6, 0.579, 0.087? (a) 0.61 (b) 0.6 (c) 0.579 (d) 0.087
  4. 4.8.44 + 4.4 = ? (a) 12.74 (b) 8.88 (c) 12.84 (d) 12.94
  5. 5.3.19 + 4.6 = ? (a) 3.65 (b) 7.69 (c) 7.79 (d) 7.89
  6. 6.Which is the smallest: 0.687, 0.77, 0.7, 0.069? (a) 0.687 (b) 0.77 (c) 0.7 (d) 0.069
  7. 7.What is the value of the digit 4 in 81.534? (a) 4 (b) 0.4 (c) 0.04 (d) 0.004
  8. 8.2.71 + 7.7 = ? (a) 10.41 (b) 10.31 (c) 10.51 (d) 3.48
  9. 9.1.47 + 2.1 = ? (a) 1.68 (b) 3.47 (c) 3.57 (d) 3.67
  10. 10.Which is the smallest: 0.286, 0.3, 0.39, 0.063? (a) 0.286 (b) 0.3 (c) 0.39 (d) 0.063
  11. 11.Which is the greatest: 0.135, 0.21, 0.087, 0.2? (a) 0.135 (b) 0.21 (c) 0.087 (d) 0.2
  12. 12.Which is the greatest: 0.86, 0.8, 0.092, 0.731? (a) 0.86 (b) 0.8 (c) 0.092 (d) 0.731
  13. 13.1.86 + 1.9 = ? (a) 3.76 (b) 2.05 (c) 3.86 (d) 3.66
  14. 14.8.44 + 5.6 = ? (a) 13.94 (b) 14.14 (c) 9 (d) 14.04
  15. 15.4.24 + 9.3 = ? (a) 13.44 (b) 5.17 (c) 13.54 (d) 13.64
  16. 16.Which is the greatest: 0.5, 0.062, 0.51, 0.424? (a) 0.5 (b) 0.062 (c) 0.51 (d) 0.424
  17. 17.Which is the greatest: 0.061, 0.134, 0.2, 0.24? (a) 0.061 (b) 0.134 (c) 0.2 (d) 0.24
  18. 18.Which is the smallest: 0.7, 0.76, 0.646, 0.093? (a) 0.7 (b) 0.76 (c) 0.646 (d) 0.093
  19. 19.Which is the smallest: 0.4, 0.42, 0.054, 0.396? (a) 0.4 (b) 0.42 (c) 0.054 (d) 0.396
  20. 20.8.09 + 9.7 = ? (a) 17.79 (b) 17.89 (c) 17.69 (d) 9.06
  21. 21.Which is the smallest: 0.5, 0.015, 0.52, 0.435? (a) 0.5 (b) 0.015 (c) 0.52 (d) 0.435
  22. 22.Which is the smallest: 0.518, 0.052, 0.6, 0.64? (a) 0.518 (b) 0.052 (c) 0.6 (d) 0.64
  23. 23.6.77 + 1.5 = ? (a) 8.37 (b) 6.92 (c) 8.17 (d) 8.27
  24. 24.What is the value of the digit 1 in 18.793? (a) 0.01 (b) 1 (c) 0.1 (d) 10
  25. 25.Which is the greatest: 0.3, 0.32, 0.011, 0.257? (a) 0.3 (b) 0.32 (c) 0.011 (d) 0.257
  26. 26.5.71 + 7.1 = ? (a) 12.71 (b) 6.42 (c) 12.91 (d) 12.81
  27. 27.7.63 + 1.8 = ? (a) 7.81 (b) 9.53 (c) 9.33 (d) 9.43
  28. 28.1.16 + 3.6 = ? (a) 4.86 (b) 4.76 (c) 4.66 (d) 1.52
  29. 29.Which is the greatest: 0.058, 0.754, 0.8, 0.86? (a) 0.058 (b) 0.754 (c) 0.8 (d) 0.86
  30. 30.What is the value of the digit 7 in 12.467? (a) 7 (b) 0.007 (c) 0.7 (d) 0.07
  31. 31.6.91 + 9.1 = ? (a) 15.91 (b) 16.01 (c) 7.82 (d) 16.11
  32. 32.What is the value of the digit 3 in 78.135? (a) 0.003 (b) 3 (c) 0.3 (d) 0.03
  33. 33.7.28 + 3.8 = ? (a) 7.66 (b) 11.18 (c) 11.08 (d) 10.98
  34. 34.Which is the greatest: 0.33, 0.3, 0.032, 0.261? (a) 0.33 (b) 0.3 (c) 0.032 (d) 0.261
  35. 35.3.82 + 9.9 = ? (a) 13.82 (b) 13.62 (c) 4.81 (d) 13.72
  36. 36.4.61 + 3.7 = ? (a) 8.21 (b) 8.41 (c) 4.98 (d) 8.31
  37. 37.4.73 + 2.7 = ? (a) 7.43 (b) 7.33 (c) 7.53 (d) 5
  38. 38.Which is the greatest: 0.582, 0.62, 0.6, 0.029? (a) 0.582 (b) 0.62 (c) 0.6 (d) 0.029
  39. 39.8.54 + 5.3 = ? (a) 13.94 (b) 13.84 (c) 9.07 (d) 13.74
  40. 40.Which is the greatest: 0.683, 0.7, 0.71, 0.062? (a) 0.683 (b) 0.7 (c) 0.71 (d) 0.062

Answer key

  1. 8.19
  2. 0.32
  3. 0.61
  4. 12.84
  5. 7.79
  6. 0.069
  7. 0.004
  8. 10.41
  9. 3.57
  10. 0.063
  11. 0.21
  12. 0.86
  13. 3.76
  14. 14.04
  15. 13.54
  16. 0.51
  17. 0.24
  18. 0.093
  19. 0.054
  20. 17.79
  21. 0.015
  22. 0.052
  23. 8.27
  24. 10
  25. 0.32
  26. 12.81
  27. 9.43
  28. 4.76
  29. 0.86
  30. 0.007
  31. 16.01
  32. 0.03
  33. 11.08
  34. 0.33
  35. 13.72
  36. 8.31
  37. 7.43
  38. 0.62
  39. 13.84
  40. 0.71

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