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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 901 · 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.Kabir has a ribbon 2/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  2. 2.4/5 − 3/10 =
  3. 3.Vihaan has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  4. 4.A bottle has 1/2 litre of juice. Tara drinks 1/9 litre. How much juice is left (in litres)? =
  5. 5.A bottle has 6/7 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  6. 6.Kabir has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  7. 7.4/7 − 1/2 =
  8. 8.2/5 − 1/4 =
  9. 9.Kabir has a ribbon 1/2 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  10. 10.6/7 − 3/4 =
  11. 11.5/8 − 1/3 =
  12. 12.4/9 − 1/3 =
  13. 13.Diya has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  14. 14.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  15. 15.Riya has a ribbon 5/6 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  16. 16.4/7 − 1/3 =
  17. 17.A bottle has 1/4 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  18. 18.4/5 − 1/10 =
  19. 19.9/10 − 1/4 =
  20. 20.A bottle has 6/7 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  21. 21.5/6 − 7/10 =
  22. 22.A tank is 3/4 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  23. 23.3/5 − 3/10 =
  24. 24.3/10 − 1/5 =
  25. 25.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? =
  26. 26.3/4 − 1/3 =
  27. 27.2/5 − 1/6 =
  28. 28.3/4 − 1/5 =
  29. 29.5/6 − 1/10 =
  30. 30.2/5 − 3/10 =
  31. 31.5/6 − 2/9 =
  32. 32.A tank is 2/3 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  33. 33.7/8 − 5/6 =
  34. 34.2/3 − 2/7 =
  35. 35.Meera has a ribbon 5/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  36. 36.1/3 − 2/7 =
  37. 37.7/8 − 3/4 =
  38. 38.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  39. 39.2/3 − 4/9 =
  40. 40.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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