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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 260 · 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. 1.4/5 − 2/3 =
  2. 2.Sara has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  3. 3.2/3 − 1/7 =
  4. 4.1/2 − 1/5 =
  5. 5.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  6. 6.A bottle has 3/4 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  7. 7.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  8. 8.Diya has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  9. 9.A bottle has 7/9 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  10. 10.Riya has a ribbon 3/4 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  11. 11.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  12. 12.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  13. 13.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  14. 14.8/9 − 1/3 =
  15. 15.2/5 − 3/10 =
  16. 16.Arjun has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  17. 17.3/4 − 1/3 =
  18. 18.Vihaan has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  19. 19.3/5 − 1/2 =
  20. 20.5/6 − 4/9 =
  21. 21.2/3 − 2/7 =
  22. 22.3/10 − 1/5 =
  23. 23.1/3 − 2/7 =
  24. 24.1/3 − 2/9 =
  25. 25.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  26. 26.2/9 − 1/6 =
  27. 27.5/6 − 1/4 =
  28. 28.A bottle has 8/9 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.7/10 − 1/6 =
  30. 30.4/9 − 1/6 =
  31. 31.1/2 − 1/7 =
  32. 32.A bottle has 6/7 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.1/3 − 1/7 =
  34. 34.4/5 − 1/3 =
  35. 35.A tank is 2/3 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  36. 36.3/4 − 3/7 =
  37. 37.2/3 − 1/5 =
  38. 38.7/9 − 2/3 =
  39. 39.A bottle has 5/8 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  40. 40.1/6 − 1/9 =

Answer key

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

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