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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 93 · 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.Aarav has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.1/3 − 1/5 =
  3. 3.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? =
  4. 4.5/6 − 7/10 =
  5. 5.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  6. 6.3/8 − 1/6 =
  7. 7.A bottle has 1/6 litre of juice. Tara drinks 1/9 litre. How much juice is left (in litres)? =
  8. 8.2/3 − 2/9 =
  9. 9.3/4 − 3/5 =
  10. 10.Vihaan has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  11. 11.1/2 − 2/5 =
  12. 12.Kabir has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  13. 13.8/9 − 1/2 =
  14. 14.A bottle has 6/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  15. 15.3/8 − 1/4 =
  16. 16.3/4 − 1/10 =
  17. 17.A bottle has 7/8 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  18. 18.A bottle has 5/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  19. 19.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  20. 20.1/2 − 1/7 =
  21. 21.5/9 − 1/6 =
  22. 22.A bottle has 2/3 litre of juice. Kabir drinks 2/7 litre. How much juice is left (in litres)? =
  23. 23.1/2 − 1/6 =
  24. 24.Meera has a ribbon 4/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  25. 25.Sara has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  26. 26.7/8 − 3/4 =
  27. 27.Diya has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  28. 28.1/2 − 2/7 =
  29. 29.7/8 − 1/6 =
  30. 30.2/3 − 1/5 =
  31. 31.2/5 − 3/10 =
  32. 32.Meera has a ribbon 9/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  33. 33.2/5 − 1/6 =
  34. 34.3/4 − 2/7 =
  35. 35.Meera has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  36. 36.Riya has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  37. 37.5/6 − 1/8 =
  38. 38.Sara has a ribbon 2/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  39. 39.2/3 − 4/7 =
  40. 40.Aarav has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =

Answer key

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

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