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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 361 · 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. 1.9/10 − 5/6 =
  2. 2.A bottle has 4/5 litre of juice. Sara drinks 3/10 litre. How much juice is left (in litres)? =
  3. 3.4/9 − 1/3 =
  4. 4.1/3 − 1/9 =
  5. 5.Sara has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.3/4 − 4/7 =
  7. 7.3/4 − 1/2 =
  8. 8.1/2 − 2/9 =
  9. 9.4/5 − 7/10 =
  10. 10.7/9 − 1/6 =
  11. 11.Ishaan has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  12. 12.5/6 − 3/4 =
  13. 13.3/5 − 1/3 =
  14. 14.1/3 − 2/7 =
  15. 15.A bottle has 5/8 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.2/7 − 1/4 =
  17. 17.Tara has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  18. 18.1/2 − 3/7 =
  19. 19.7/8 − 1/3 =
  20. 20.1/4 − 1/5 =
  21. 21.1/6 − 1/9 =
  22. 22.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  23. 23.Riya has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  24. 24.Diya has a ribbon 1/2 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  25. 25.7/8 − 1/6 =
  26. 26.2/5 − 3/10 =
  27. 27.2/3 − 2/9 =
  28. 28.A bottle has 1/3 litre of juice. Rohan drinks 1/7 litre. How much juice is left (in litres)? =
  29. 29.Ishaan has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  30. 30.5/7 − 2/3 =
  31. 31.3/5 − 1/4 =
  32. 32.7/8 − 3/4 =
  33. 33.Anaya has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  34. 34.Kabir has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  35. 35.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  36. 36.A tank is 1/6 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  37. 37.A bottle has 2/3 litre of juice. Aarav drinks 4/7 litre. How much juice is left (in litres)? =
  38. 38.6/7 − 1/3 =
  39. 39.Sara has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  40. 40.4/5 − 2/3 =

Answer key

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

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