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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 638 · 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.Rohan has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  2. 2.A bottle has 3/8 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.Tara has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  4. 4.Arjun has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  5. 5.3/10 − 1/4 =
  6. 6.Kabir has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  7. 7.6/7 − 2/3 =
  8. 8.Kabir has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  9. 9.1/4 − 1/5 =
  10. 10.3/4 − 1/10 =
  11. 11.8/9 − 5/6 =
  12. 12.2/3 − 1/9 =
  13. 13.A bottle has 1/3 litre of juice. Anaya drinks 2/9 litre. How much juice is left (in litres)? =
  14. 14.5/6 − 1/2 =
  15. 15.4/7 − 1/2 =
  16. 16.2/5 − 1/10 =
  17. 17.A bottle has 1/2 litre of juice. Meera drinks 3/7 litre. How much juice is left (in litres)? =
  18. 18.Rohan has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  19. 19.A bottle has 3/10 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  20. 20.Kabir has a ribbon 5/6 m long and cuts off 7/9 m. How long is the ribbon now (in m)? =
  21. 21.5/6 − 5/9 =
  22. 22.A bottle has 1/2 litre of juice. Aarav drinks 1/7 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 2/3 litre of juice. Tara drinks 1/5 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 1/9 =
  25. 25.5/6 − 1/8 =
  26. 26.1/4 − 1/7 =
  27. 27.A tank is 2/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  28. 28.4/7 − 1/4 =
  29. 29.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  30. 30.4/9 − 1/3 =
  31. 31.5/7 − 2/3 =
  32. 32.7/10 − 2/3 =
  33. 33.5/6 − 2/9 =
  34. 34.5/6 − 1/4 =
  35. 35.7/8 − 2/3 =
  36. 36.Kabir has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  37. 37.6/7 − 1/2 =
  38. 38.A bottle has 9/10 litre of juice. Meera drinks 5/6 litre. How much juice is left (in litres)? =
  39. 39.3/5 − 1/6 =
  40. 40.2/3 − 1/4 =

Answer key

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

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