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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 32 · 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. 1.1/3 − 1/7 =
  2. 2.Diya has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 7/8 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  4. 4.3/4 − 1/3 =
  5. 5.Aarav has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.4/5 − 1/10 =
  7. 7.1/2 − 1/5 =
  8. 8.3/5 − 1/10 =
  9. 9.2/5 − 3/10 =
  10. 10.9/10 − 3/4 =
  11. 11.2/3 − 1/4 =
  12. 12.3/4 − 5/8 =
  13. 13.A bottle has 7/8 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  14. 14.3/5 − 1/6 =
  15. 15.5/6 − 1/10 =
  16. 16.1/3 − 1/5 =
  17. 17.2/5 − 1/6 =
  18. 18.Rohan has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  19. 19.A bottle has 3/5 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  20. 20.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  21. 21.8/9 − 2/3 =
  22. 22.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  23. 23.Anaya has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  24. 24.5/6 − 7/10 =
  25. 25.1/3 − 1/10 =
  26. 26.A bottle has 3/4 litre of juice. Vihaan drinks 5/7 litre. How much juice is left (in litres)? =
  27. 27.Anaya has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  28. 28.5/7 − 2/3 =
  29. 29.3/4 − 1/8 =
  30. 30.2/3 − 1/7 =
  31. 31.3/8 − 1/3 =
  32. 32.A tank is 5/6 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.3/4 − 3/8 =
  34. 34.7/8 − 1/3 =
  35. 35.Rohan has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  36. 36.7/10 − 1/4 =
  37. 37.Aarav has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  38. 38.2/3 − 5/9 =
  39. 39.A bottle has 2/3 litre of juice. Rohan drinks 2/9 litre. How much juice is left (in litres)? =
  40. 40.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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