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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 381 · 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. 2.1/3 − 1/10 =
  3. 3.7/8 − 1/6 =
  4. 4.7/10 − 1/3 =
  5. 5.3/10 − 1/5 =
  6. 6.5/7 − 1/3 =
  7. 7.Diya has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  8. 8.5/6 − 3/8 =
  9. 9.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? =
  10. 10.Tara has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  11. 11.A bottle has 3/4 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  12. 12.9/10 − 1/5 =
  13. 13.Sara has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  14. 14.3/4 − 1/8 =
  15. 15.7/10 − 1/2 =
  16. 16.1/3 − 2/7 =
  17. 17.Tara has a ribbon 3/4 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  18. 18.Aarav has a ribbon 2/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 7/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  20. 20.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 2/3 litre of juice. Ishaan drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.5/6 − 2/9 =
  23. 23.2/3 − 4/9 =
  24. 24.5/7 − 1/4 =
  25. 25.2/3 − 2/7 =
  26. 26.A bottle has 1/2 litre of juice. Sara drinks 2/9 litre. How much juice is left (in litres)? =
  27. 27.A bottle has 5/9 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  28. 28.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  29. 29.A bottle has 1/4 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  30. 30.9/10 − 1/4 =
  31. 31.A tank is 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  32. 32.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  33. 33.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  34. 34.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  35. 35.A bottle has 2/9 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 1/2 litre of juice. Kabir drinks 1/7 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 3/4 litre of juice. Arjun drinks 3/8 litre. How much juice is left (in litres)? =
  38. 38.A bottle has 3/5 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  39. 39.A bottle has 3/8 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  40. 40.Aarav has a ribbon 1/2 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =

Answer key

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

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