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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 943 · 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.A bottle has 9/10 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  2. 2.Kabir has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  3. 3.1/2 − 1/4 =
  4. 4.A bottle has 7/9 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.3/10 − 1/4 =
  6. 6.A tank is 3/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  7. 7.7/10 − 1/6 =
  8. 8.7/8 − 1/3 =
  9. 9.5/7 − 2/3 =
  10. 10.2/9 − 1/6 =
  11. 11.Arjun has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  12. 12.1/3 − 1/9 =
  13. 13.Anaya has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  14. 14.2/7 − 1/4 =
  15. 15.4/5 − 7/10 =
  16. 16.2/3 − 3/7 =
  17. 17.Sara has a ribbon 3/4 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  18. 18.Sara has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  19. 19.2/3 − 1/7 =
  20. 20.A bottle has 5/6 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  21. 21.5/6 − 3/4 =
  22. 22.1/3 − 2/7 =
  23. 23.A tank is 1/2 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  24. 24.Tara has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  25. 25.5/6 − 4/9 =
  26. 26.2/5 − 3/10 =
  27. 27.2/3 − 4/7 =
  28. 28.A tank is 4/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  29. 29.6/7 − 1/2 =
  30. 30.A bottle has 8/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  31. 31.5/7 − 1/3 =
  32. 32.3/4 − 1/8 =
  33. 33.2/5 − 1/4 =
  34. 34.8/9 − 2/3 =
  35. 35.Riya has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  36. 36.7/8 − 3/4 =
  37. 37.2/3 − 4/9 =
  38. 38.3/5 − 1/2 =
  39. 39.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  40. 40.A bottle has 1/3 litre of juice. Vihaan drinks 1/9 litre. How much juice is left (in litres)? =

Answer key

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

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