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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 767 · 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. 1.7/10 − 1/5 =
  2. 2.6/7 − 2/3 =
  3. 3.5/6 − 2/3 =
  4. 4.A bottle has 3/4 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  5. 5.Kabir has a ribbon 5/6 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  6. 6.5/8 − 1/2 =
  7. 7.3/4 − 1/5 =
  8. 8.5/6 − 1/3 =
  9. 9.2/3 − 4/7 =
  10. 10.5/6 − 4/9 =
  11. 11.A bottle has 7/8 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  12. 12.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  13. 13.Meera has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  14. 14.2/3 − 1/10 =
  15. 15.Aarav has a ribbon 3/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  16. 16.5/7 − 1/2 =
  17. 17.A bottle has 1/3 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  18. 18.5/9 − 1/3 =
  19. 19.5/7 − 1/3 =
  20. 20.5/7 − 2/3 =
  21. 21.Riya has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  22. 22.9/10 − 3/5 =
  23. 23.A tank is 1/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 5/6 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  25. 25.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  26. 26.8/9 − 1/3 =
  27. 27.4/7 − 1/2 =
  28. 28.A bottle has 4/7 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.1/5 − 1/6 =
  30. 30.Aarav has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  31. 31.2/3 − 2/9 =
  32. 32.7/8 − 1/3 =
  33. 33.5/6 − 1/10 =
  34. 34.5/6 − 1/4 =
  35. 35.Tara has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  36. 36.7/9 − 1/3 =
  37. 37.A bottle has 2/3 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  38. 38.Sara has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  39. 39.2/3 − 1/8 =
  40. 40.Kabir has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =

Answer key

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

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