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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 356 · 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. 1.3/4 − 2/3 =
  2. 2.1/3 − 2/7 =
  3. 3.3/4 − 3/7 =
  4. 4.1/3 − 1/9 =
  5. 5.A bottle has 1/3 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  6. 6.2/3 − 5/8 =
  7. 7.7/8 − 1/4 =
  8. 8.3/8 − 1/3 =
  9. 9.5/6 − 2/9 =
  10. 10.Anaya has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  11. 11.3/7 − 1/3 =
  12. 12.2/3 − 1/9 =
  13. 13.Aarav has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 3/10 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.3/4 − 2/7 =
  16. 16.2/3 − 1/8 =
  17. 17.A tank is 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  18. 18.3/4 − 1/10 =
  19. 19.1/2 − 1/8 =
  20. 20.7/8 − 1/6 =
  21. 21.4/5 − 1/10 =
  22. 22.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  23. 23.A bottle has 9/10 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  24. 24.8/9 − 1/2 =
  25. 25.A bottle has 3/5 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 1/4 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  27. 27.8/9 − 2/3 =
  28. 28.4/5 − 3/4 =
  29. 29.A tank is 2/3 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  30. 30.A bottle has 2/3 litre of juice. Tara drinks 2/7 litre. How much juice is left (in litres)? =
  31. 31.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  32. 32.Kabir has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  33. 33.2/3 − 4/9 =
  34. 34.9/10 − 1/4 =
  35. 35.2/5 − 1/6 =
  36. 36.5/6 − 1/4 =
  37. 37.Kabir has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  38. 38.Kabir has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.5/9 − 1/3 =
  40. 40.Vihaan has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =

Answer key

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

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