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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 296 · 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 7/10 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  2. 2.3/7 − 1/4 =
  3. 3.2/5 − 3/10 =
  4. 4.A bottle has 7/8 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.3/8 − 1/4 =
  6. 6.8/9 − 1/6 =
  7. 7.1/3 − 1/9 =
  8. 8.3/4 − 7/10 =
  9. 9.9/10 − 1/6 =
  10. 10.Riya has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  11. 11.A bottle has 5/7 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  12. 12.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  13. 13.1/3 − 1/5 =
  14. 14.A bottle has 1/2 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  15. 15.3/10 − 1/5 =
  16. 16.A bottle has 4/5 litre of juice. Aarav drinks 3/4 litre. How much juice is left (in litres)? =
  17. 17.5/9 − 1/3 =
  18. 18.9/10 − 1/2 =
  19. 19.5/6 − 5/9 =
  20. 20.1/5 − 1/6 =
  21. 21.Riya has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 2/5 litre of juice. Vihaan drinks 3/10 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 2/3 litre of juice. Anaya drinks 4/7 litre. How much juice is left (in litres)? =
  24. 24.4/5 − 1/10 =
  25. 25.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  26. 26.5/7 − 1/2 =
  27. 27.A bottle has 1/3 litre of juice. Riya drinks 2/7 litre. How much juice is left (in litres)? =
  28. 28.2/3 − 2/9 =
  29. 29.5/7 − 2/3 =
  30. 30.3/4 − 5/8 =
  31. 31.A tank is 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  32. 32.7/9 − 2/3 =
  33. 33.A bottle has 1/4 litre of juice. Riya drinks 1/8 litre. How much juice is left (in litres)? =
  34. 34.7/10 − 1/4 =
  35. 35.Anaya has a ribbon 1/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 9/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  37. 37.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  38. 38.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  39. 39.1/6 − 1/9 =
  40. 40.5/6 − 4/9 =

Answer key

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

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