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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 529 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.4/5 − 1/2 =
  2. 2.A bottle has 2/9 litre of juice. Meera drinks 1/6 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 3/4 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  4. 4.Sara has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  5. 5.8/9 − 1/3 =
  6. 6.7/9 − 2/3 =
  7. 7.3/5 − 1/3 =
  8. 8.4/7 − 1/4 =
  9. 9.2/3 − 2/9 =
  10. 10.3/8 − 1/3 =
  11. 11.9/10 − 2/5 =
  12. 12.7/9 − 1/3 =
  13. 13.Diya has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  14. 14.3/10 − 1/4 =
  15. 15.A bottle has 3/5 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.2/3 − 1/8 =
  17. 17.1/3 − 1/10 =
  18. 18.Diya has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  19. 19.Ishaan has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  20. 20.2/5 − 3/10 =
  21. 21.Riya has a ribbon 7/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  22. 22.2/3 − 2/7 =
  23. 23.A tank is 4/5 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 7/8 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  25. 25.Sara has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  26. 26.3/4 − 3/8 =
  27. 27.2/9 − 1/6 =
  28. 28.Vihaan has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  29. 29.1/2 − 1/3 =
  30. 30.3/4 − 2/5 =
  31. 31.6/7 − 1/2 =
  32. 32.A bottle has 4/7 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.7/10 − 1/6 =
  34. 34.1/2 − 2/9 =
  35. 35.1/4 − 1/6 =
  36. 36.8/9 − 1/6 =
  37. 37.A bottle has 1/2 litre of juice. Sara drinks 2/9 litre. How much juice is left (in litres)? =
  38. 38.4/9 − 1/3 =
  39. 39.A bottle has 5/6 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  40. 40.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =

Answer key

  1. 3/10
  2. 1/18
  3. 5/12
  4. 4/9
  5. 5/9
  6. 1/9
  7. 4/15
  8. 9/28
  9. 4/9
  10. 1/24
  11. 1/2
  12. 4/9
  13. 2/21
  14. 1/20
  15. 4/15
  16. 13/24
  17. 7/30
  18. 7/10
  19. 5/8
  20. 1/10
  21. 9/20
  22. 8/21
  23. 2/15
  24. 1/24
  25. 1/18
  26. 3/8
  27. 1/18
  28. 1/15
  29. 1/6
  30. 7/20
  31. 5/14
  32. 9/28
  33. 8/15
  34. 5/18
  35. 1/12
  36. 13/18
  37. 5/18
  38. 1/9
  39. 7/18
  40. 1/2

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