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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 538 · 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. 1.1/3 − 1/7 =
  2. 2.3/5 − 1/10 =
  3. 3.1/2 − 3/10 =
  4. 4.Arjun has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  5. 5.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  6. 6.5/6 − 2/5 =
  7. 7.7/10 − 2/5 =
  8. 8.A bottle has 1/2 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  9. 9.3/4 − 1/8 =
  10. 10.Meera has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  11. 11.5/6 − 5/8 =
  12. 12.A bottle has 5/9 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  13. 13.Arjun has a ribbon 2/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  14. 14.Arjun has a ribbon 8/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  15. 15.1/5 − 1/6 =
  16. 16.A bottle has 4/9 litre of juice. Vihaan drinks 1/6 litre. How much juice is left (in litres)? =
  17. 17.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  18. 18.A bottle has 7/8 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.1/3 − 1/8 =
  20. 20.A tank is 5/6 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  21. 21.Diya has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  22. 22.7/9 − 1/3 =
  23. 23.9/10 − 2/3 =
  24. 24.Sara has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  25. 25.2/5 − 1/10 =
  26. 26.1/2 − 2/9 =
  27. 27.9/10 − 3/5 =
  28. 28.2/3 − 1/2 =
  29. 29.2/3 − 1/8 =
  30. 30.6/7 − 3/4 =
  31. 31.Kabir has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  32. 32.A bottle has 4/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  33. 33.4/9 − 1/6 =
  34. 34.Vihaan has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  35. 35.1/4 − 1/8 =
  36. 36.3/4 − 7/10 =
  37. 37.1/2 − 1/10 =
  38. 38.3/8 − 1/6 =
  39. 39.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  40. 40.A bottle has 1/3 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =

Answer key

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

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