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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 958 · 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 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  2. 2.3/5 − 1/6 =
  3. 3.A bottle has 5/6 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 1/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  5. 5.5/6 − 7/9 =
  6. 6.2/3 − 2/9 =
  7. 7.3/4 − 1/7 =
  8. 8.2/3 − 1/4 =
  9. 9.7/8 − 5/6 =
  10. 10.A tank is 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  11. 11.2/3 − 4/7 =
  12. 12.Diya has a ribbon 3/4 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  13. 13.5/6 − 7/10 =
  14. 14.4/5 − 1/6 =
  15. 15.1/3 − 1/7 =
  16. 16.5/8 − 1/2 =
  17. 17.4/5 − 7/10 =
  18. 18.2/9 − 1/6 =
  19. 19.1/2 − 1/4 =
  20. 20.7/10 − 2/3 =
  21. 21.2/3 − 3/8 =
  22. 22.2/3 − 1/7 =
  23. 23.1/2 − 1/6 =
  24. 24.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? =
  25. 25.5/6 − 4/9 =
  26. 26.2/3 − 4/9 =
  27. 27.A bottle has 3/5 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  28. 28.Anaya has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  29. 29.Ishaan has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  30. 30.2/3 − 2/7 =
  31. 31.Riya has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  32. 32.6/7 − 2/3 =
  33. 33.6/7 − 3/4 =
  34. 34.5/6 − 2/9 =
  35. 35.A bottle has 1/3 litre of juice. Rohan drinks 2/9 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 9/10 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  37. 37.2/5 − 1/4 =
  38. 38.1/2 − 3/8 =
  39. 39.1/3 − 1/8 =
  40. 40.A bottle has 3/4 litre of juice. Tara drinks 2/7 litre. How much juice is left (in litres)? =

Answer key

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

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