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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 468 · 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. 1.1/2 − 3/8 =
  2. 2.6/7 − 2/3 =
  3. 3.7/9 − 1/2 =
  4. 4.A bottle has 1/5 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  5. 5.1/4 − 1/5 =
  6. 6.7/9 − 1/3 =
  7. 7.Diya has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  8. 8.2/9 − 1/6 =
  9. 9.Diya has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  10. 10.2/3 − 5/9 =
  11. 11.A tank is 3/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  12. 12.Diya has a ribbon 1/2 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  13. 13.A bottle has 6/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  14. 14.7/10 − 1/2 =
  15. 15.A bottle has 4/9 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  16. 16.5/6 − 7/10 =
  17. 17.A bottle has 9/10 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.4/7 − 1/3 =
  19. 19.A tank is 2/3 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  20. 20.8/9 − 1/6 =
  21. 21.7/10 − 3/5 =
  22. 22.9/10 − 3/5 =
  23. 23.1/2 − 4/9 =
  24. 24.9/10 − 1/6 =
  25. 25.1/5 − 1/6 =
  26. 26.3/8 − 1/4 =
  27. 27.7/8 − 1/3 =
  28. 28.A bottle has 4/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  29. 29.9/10 − 4/5 =
  30. 30.7/8 − 5/6 =
  31. 31.Riya has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  32. 32.1/2 − 1/5 =
  33. 33.2/3 − 1/7 =
  34. 34.A bottle has 3/4 litre of juice. Ishaan drinks 3/7 litre. How much juice is left (in litres)? =
  35. 35.1/3 − 2/9 =
  36. 36.7/8 − 2/3 =
  37. 37.2/3 − 2/7 =
  38. 38.A bottle has 9/10 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  39. 39.A tank is 7/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  40. 40.Anaya has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =

Answer key

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

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