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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 221 · 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. 1.2/3 − 1/5 =
  2. 2.1/3 − 1/8 =
  3. 3.A tank is 7/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/3 − 5/9 =
  5. 5.Diya has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 1/6 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 6/7 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.A bottle has 7/10 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  9. 9.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  10. 10.2/7 − 1/4 =
  11. 11.2/3 − 2/9 =
  12. 12.3/4 − 3/5 =
  13. 13.Riya has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  14. 14.2/5 − 3/10 =
  15. 15.1/6 − 1/9 =
  16. 16.3/4 − 1/5 =
  17. 17.1/2 − 2/5 =
  18. 18.1/2 − 1/3 =
  19. 19.8/9 − 1/2 =
  20. 20.A bottle has 9/10 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 9/10 litre of juice. Riya drinks 5/6 litre. How much juice is left (in litres)? =
  22. 22.2/9 − 1/6 =
  23. 23.Meera has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  24. 24.2/3 − 1/8 =
  25. 25.A bottle has 2/5 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  26. 26.1/4 − 1/7 =
  27. 27.3/5 − 1/3 =
  28. 28.Kabir has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  29. 29.8/9 − 1/6 =
  30. 30.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  31. 31.Anaya has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  32. 32.2/5 − 1/10 =
  33. 33.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 2/5 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  35. 35.4/5 − 3/10 =
  36. 36.A bottle has 2/5 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 7/8 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  38. 38.7/10 − 1/5 =
  39. 39.1/2 − 1/8 =
  40. 40.Sara has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =

Answer key

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

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