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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 220 · 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.A bottle has 1/3 litre of juice. Arjun drinks 2/9 litre. How much juice is left (in litres)? =
  2. 2.2/5 − 1/4 =
  3. 3.5/9 − 1/6 =
  4. 4.A bottle has 1/2 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  5. 5.Vihaan has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.Kabir has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  7. 7.2/3 − 3/5 =
  8. 8.1/2 − 2/7 =
  9. 9.3/5 − 1/6 =
  10. 10.3/5 − 1/3 =
  11. 11.A tank is 4/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  12. 12.3/4 − 5/7 =
  13. 13.5/6 − 5/8 =
  14. 14.3/5 − 3/10 =
  15. 15.5/6 − 5/9 =
  16. 16.A bottle has 9/10 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.A bottle has 3/4 litre of juice. Sara drinks 3/5 litre. How much juice is left (in litres)? =
  18. 18.3/8 − 1/3 =
  19. 19.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  20. 20.3/4 − 1/8 =
  21. 21.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.3/4 − 2/7 =
  23. 23.4/5 − 1/10 =
  24. 24.A bottle has 2/5 litre of juice. Riya drinks 1/10 litre. How much juice is left (in litres)? =
  25. 25.7/8 − 1/3 =
  26. 26.A tank is 5/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  27. 27.3/10 − 1/5 =
  28. 28.3/4 − 1/6 =
  29. 29.5/8 − 1/4 =
  30. 30.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 1/4 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  32. 32.7/9 − 1/6 =
  33. 33.A bottle has 9/10 litre of juice. Anaya drinks 3/5 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 7/10 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  35. 35.Aarav has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  36. 36.4/7 − 1/3 =
  37. 37.5/9 − 1/3 =
  38. 38.Diya has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  39. 39.1/2 − 1/8 =
  40. 40.3/4 − 1/2 =

Answer key

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

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