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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 272 · 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. 1.1/3 − 1/9 =
  2. 2.A bottle has 3/4 litre of juice. Aarav drinks 5/8 litre. How much juice is left (in litres)? =
  3. 3.2/7 − 1/4 =
  4. 4.Kabir has a ribbon 9/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  5. 5.6/7 − 1/4 =
  6. 6.Diya has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  7. 7.2/3 − 3/7 =
  8. 8.3/4 − 1/8 =
  9. 9.Ishaan has a ribbon 2/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  10. 10.1/2 − 3/10 =
  11. 11.A bottle has 2/3 litre of juice. Meera drinks 3/8 litre. How much juice is left (in litres)? =
  12. 12.5/8 − 1/3 =
  13. 13.A bottle has 2/3 litre of juice. Diya drinks 4/9 litre. How much juice is left (in litres)? =
  14. 14.Meera has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  15. 15.1/5 − 1/10 =
  16. 16.8/9 − 5/6 =
  17. 17.1/4 − 1/8 =
  18. 18.7/8 − 1/3 =
  19. 19.Rohan has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  20. 20.4/7 − 1/4 =
  21. 21.6/7 − 3/4 =
  22. 22.5/6 − 2/9 =
  23. 23.4/7 − 1/2 =
  24. 24.1/3 − 1/10 =
  25. 25.4/9 − 1/3 =
  26. 26.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  27. 27.Anaya has a ribbon 3/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  28. 28.A bottle has 3/5 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.7/9 − 1/6 =
  30. 30.2/3 − 3/8 =
  31. 31.Sara has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  32. 32.1/6 − 1/10 =
  33. 33.3/7 − 1/4 =
  34. 34.7/8 − 3/4 =
  35. 35.Rohan has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 3/4 litre of juice. Vihaan drinks 1/8 litre. How much juice is left (in litres)? =
  37. 37.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 3/4 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  39. 39.Kabir has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 1/3 litre of juice. Ishaan drinks 1/7 litre. How much juice is left (in litres)? =

Answer key

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

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