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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 69 · 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 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  2. 2.9/10 − 2/5 =
  3. 3.Kabir has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  4. 4.3/4 − 2/7 =
  5. 5.Meera has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  6. 6.3/8 − 1/3 =
  7. 7.5/9 − 1/6 =
  8. 8.A bottle has 9/10 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 2/3 litre of juice. Kabir drinks 4/7 litre. How much juice is left (in litres)? =
  10. 10.Diya has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  11. 11.Anaya has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  12. 12.1/2 − 1/10 =
  13. 13.8/9 − 2/3 =
  14. 14.Tara has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  15. 15.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? =
  16. 16.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.2/3 − 5/9 =
  18. 18.2/3 − 1/7 =
  19. 19.A bottle has 3/4 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  20. 20.Diya has a ribbon 3/4 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  21. 21.3/5 − 1/2 =
  22. 22.6/7 − 2/3 =
  23. 23.5/6 − 2/9 =
  24. 24.7/10 − 1/3 =
  25. 25.1/3 − 2/7 =
  26. 26.5/6 − 2/5 =
  27. 27.9/10 − 3/5 =
  28. 28.5/7 − 1/4 =
  29. 29.A bottle has 5/8 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 1/2 litre of juice. Sara drinks 4/9 litre. How much juice is left (in litres)? =
  31. 31.8/9 − 1/6 =
  32. 32.1/5 − 1/10 =
  33. 33.7/10 − 1/6 =
  34. 34.4/5 − 1/3 =
  35. 35.A bottle has 8/9 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  36. 36.5/6 − 5/9 =
  37. 37.1/2 − 1/7 =
  38. 38.3/4 − 3/5 =
  39. 39.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  40. 40.3/4 − 3/7 =

Answer key

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

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