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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 367 · 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. 1.1/2 − 3/7 =
  2. 2.Anaya has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.1/5 − 1/6 =
  4. 4.A bottle has 5/9 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  5. 5.Rohan has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  6. 6.3/4 − 1/7 =
  7. 7.1/3 − 1/7 =
  8. 8.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  9. 9.3/4 − 1/3 =
  10. 10.5/6 − 1/9 =
  11. 11.3/5 − 1/10 =
  12. 12.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 2/3 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  14. 14.9/10 − 1/6 =
  15. 15.3/10 − 1/5 =
  16. 16.1/3 − 1/4 =
  17. 17.1/4 − 1/10 =
  18. 18.3/4 − 2/3 =
  19. 19.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.3/4 − 3/8 =
  21. 21.9/10 − 3/5 =
  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.Riya has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  24. 24.6/7 − 1/4 =
  25. 25.2/3 − 1/9 =
  26. 26.Kabir has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  27. 27.5/6 − 3/5 =
  28. 28.A bottle has 3/8 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  29. 29.7/8 − 1/3 =
  30. 30.4/7 − 1/3 =
  31. 31.6/7 − 2/3 =
  32. 32.A bottle has 1/3 litre of juice. Diya drinks 1/8 litre. How much juice is left (in litres)? =
  33. 33.Arjun has a ribbon 2/3 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 5/6 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  35. 35.2/5 − 1/4 =
  36. 36.A bottle has 2/3 litre of juice. Diya drinks 4/7 litre. How much juice is left (in litres)? =
  37. 37.7/10 − 1/5 =
  38. 38.A bottle has 3/4 litre of juice. Diya drinks 4/7 litre. How much juice is left (in litres)? =
  39. 39.Vihaan has a ribbon 9/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  40. 40.6/7 − 1/2 =

Answer key

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

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