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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 628 · 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.Tara has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  2. 2.5/7 − 2/3 =
  3. 3.Kabir has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  4. 4.A tank is 1/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  5. 5.Riya has a ribbon 1/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  6. 6.8/9 − 2/3 =
  7. 7.5/7 − 1/2 =
  8. 8.5/6 − 2/3 =
  9. 9.5/6 − 7/9 =
  10. 10.2/3 − 1/10 =
  11. 11.4/5 − 3/10 =
  12. 12.5/7 − 1/3 =
  13. 13.A bottle has 5/8 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  14. 14.4/7 − 1/3 =
  15. 15.7/10 − 1/3 =
  16. 16.9/10 − 2/5 =
  17. 17.A bottle has 5/6 litre of juice. Diya drinks 2/5 litre. How much juice is left (in litres)? =
  18. 18.4/5 − 2/3 =
  19. 19.4/5 − 7/10 =
  20. 20.Vihaan has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  21. 21.2/3 − 5/9 =
  22. 22.5/8 − 1/4 =
  23. 23.A bottle has 2/3 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  24. 24.8/9 − 1/6 =
  25. 25.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  26. 26.4/5 − 1/10 =
  27. 27.2/3 − 4/9 =
  28. 28.3/4 − 2/7 =
  29. 29.2/3 − 1/9 =
  30. 30.Ishaan has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  31. 31.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  32. 32.4/7 − 1/4 =
  33. 33.2/3 − 4/7 =
  34. 34.A bottle has 1/3 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  35. 35.3/5 − 1/2 =
  36. 36.Vihaan has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  37. 37.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? =
  38. 38.3/4 − 1/3 =
  39. 39.A bottle has 2/5 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  40. 40.Riya has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =

Answer key

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

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