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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 303 · 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 tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  2. 2.Vihaan has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  3. 3.3/5 − 1/6 =
  4. 4.A bottle has 2/3 litre of juice. Vihaan drinks 3/7 litre. How much juice is left (in litres)? =
  5. 5.3/5 − 1/10 =
  6. 6.4/5 − 1/6 =
  7. 7.3/4 − 3/10 =
  8. 8.2/3 − 5/8 =
  9. 9.Aarav has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  10. 10.Anaya has a ribbon 1/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  11. 11.4/5 − 3/10 =
  12. 12.3/4 − 1/6 =
  13. 13.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  14. 14.A tank is 1/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  15. 15.5/7 − 2/3 =
  16. 16.2/5 − 1/3 =
  17. 17.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  18. 18.Tara has a ribbon 1/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  19. 19.5/6 − 1/9 =
  20. 20.3/4 − 1/8 =
  21. 21.A bottle has 9/10 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  22. 22.2/3 − 5/9 =
  23. 23.A bottle has 7/8 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  24. 24.Ishaan has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  25. 25.A bottle has 6/7 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  26. 26.8/9 − 5/6 =
  27. 27.4/5 − 7/10 =
  28. 28.1/3 − 1/8 =
  29. 29.Aarav has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 5/6 litre of juice. Ishaan drinks 7/9 litre. How much juice is left (in litres)? =
  31. 31.Sara has a ribbon 2/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  32. 32.2/3 − 4/9 =
  33. 33.A bottle has 7/8 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  34. 34.Kabir has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  35. 35.3/4 − 1/2 =
  36. 36.6/7 − 1/2 =
  37. 37.3/4 − 5/8 =
  38. 38.A bottle has 5/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  39. 39.2/3 − 1/5 =
  40. 40.4/5 − 3/4 =

Answer key

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

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