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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 700 · 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. 1.2/9 − 1/6 =
  2. 2.A tank is 7/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  3. 3.A bottle has 3/8 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 2/3 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  5. 5.Meera has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  6. 6.8/9 − 1/6 =
  7. 7.5/8 − 1/3 =
  8. 8.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? =
  9. 9.3/10 − 1/5 =
  10. 10.A bottle has 2/3 litre of juice. Kabir drinks 3/8 litre. How much juice is left (in litres)? =
  11. 11.1/2 − 2/5 =
  12. 12.4/5 − 2/3 =
  13. 13.Vihaan has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  14. 14.Sara has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 5/6 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  16. 16.5/9 − 1/2 =
  17. 17.3/4 − 3/5 =
  18. 18.3/4 − 3/7 =
  19. 19.9/10 − 5/6 =
  20. 20.1/2 − 1/7 =
  21. 21.2/3 − 1/4 =
  22. 22.5/7 − 1/4 =
  23. 23.Kabir has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  24. 24.1/3 − 2/7 =
  25. 25.5/6 − 7/10 =
  26. 26.3/4 − 2/7 =
  27. 27.1/3 − 1/10 =
  28. 28.A bottle has 2/3 litre of juice. Tara drinks 5/9 litre. How much juice is left (in litres)? =
  29. 29.2/3 − 4/9 =
  30. 30.7/10 − 1/3 =
  31. 31.7/9 − 2/3 =
  32. 32.3/4 − 2/5 =
  33. 33.A bottle has 4/9 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  34. 34.1/4 − 1/5 =
  35. 35.Aarav has a ribbon 1/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  36. 36.3/4 − 1/7 =
  37. 37.1/5 − 1/10 =
  38. 38.Vihaan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 1/6 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  40. 40.4/5 − 3/4 =

Answer key

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

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