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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 498 · 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. 1.9/10 − 1/6 =
  2. 2.Sara has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  3. 3.2/3 − 3/5 =
  4. 4.1/2 − 2/9 =
  5. 5.A bottle has 9/10 litre of juice. Vihaan drinks 2/5 litre. How much juice is left (in litres)? =
  6. 6.3/4 − 3/8 =
  7. 7.2/3 − 4/9 =
  8. 8.4/5 − 7/10 =
  9. 9.8/9 − 1/2 =
  10. 10.2/3 − 1/7 =
  11. 11.A bottle has 1/3 litre of juice. Vihaan drinks 2/9 litre. How much juice is left (in litres)? =
  12. 12.Arjun has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  13. 13.2/3 − 1/5 =
  14. 14.2/3 − 3/8 =
  15. 15.A bottle has 3/4 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  16. 16.1/3 − 2/7 =
  17. 17.2/3 − 1/6 =
  18. 18.5/7 − 1/4 =
  19. 19.A bottle has 7/8 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  20. 20.A tank is 5/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  21. 21.3/4 − 3/7 =
  22. 22.5/6 − 3/4 =
  23. 23.3/5 − 1/10 =
  24. 24.5/9 − 1/3 =
  25. 25.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  26. 26.4/9 − 1/6 =
  27. 27.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  28. 28.Anaya has a ribbon 7/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  29. 29.Meera has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 1/4 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  31. 31.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 8/9 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  33. 33.3/7 − 1/3 =
  34. 34.1/4 − 1/5 =
  35. 35.A bottle has 7/9 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.1/2 − 3/10 =
  37. 37.2/3 − 3/7 =
  38. 38.5/6 − 3/10 =
  39. 39.A bottle has 5/8 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.1/3 − 1/5 =

Answer key

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

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