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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 19 · 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 − 2/5 =
  2. 2.A tank is 5/6 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  3. 3.Tara has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  4. 4.A bottle has 2/3 litre of juice. Riya drinks 2/9 litre. How much juice is left (in litres)? =
  5. 5.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  6. 6.3/10 − 1/5 =
  7. 7.2/9 − 1/6 =
  8. 8.Vihaan has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  9. 9.2/3 − 3/7 =
  10. 10.5/6 − 7/9 =
  11. 11.2/3 − 1/8 =
  12. 12.7/8 − 1/4 =
  13. 13.A bottle has 3/4 litre of juice. Sara drinks 3/8 litre. How much juice is left (in litres)? =
  14. 14.1/3 − 1/9 =
  15. 15.2/7 − 1/4 =
  16. 16.1/3 − 1/5 =
  17. 17.A bottle has 2/5 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 7/8 litre of juice. Kabir drinks 3/4 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 5/6 litre of juice. Riya drinks 1/10 litre. How much juice is left (in litres)? =
  20. 20.1/2 − 1/7 =
  21. 21.5/8 − 1/3 =
  22. 22.2/5 − 1/10 =
  23. 23.Sara has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  24. 24.Kabir has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  25. 25.Ishaan has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  26. 26.Ishaan has a ribbon 1/2 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  27. 27.Rohan has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  28. 28.Kabir has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 8/9 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  30. 30.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  31. 31.2/3 − 2/7 =
  32. 32.3/10 − 1/4 =
  33. 33.A tank is 7/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 9/10 litre of juice. Rohan drinks 5/6 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 6/7 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  36. 36.4/7 − 1/2 =
  37. 37.Sara has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  38. 38.5/6 − 1/3 =
  39. 39.Meera has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  40. 40.Diya has a ribbon 1/2 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =

Answer key

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

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