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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 598 · 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.Sara has a ribbon 1/2 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  2. 2.5/9 − 1/6 =
  3. 3.Aarav has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  4. 4.Rohan has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  5. 5.A bottle has 5/8 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.Vihaan has a ribbon 5/6 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  7. 7.5/6 − 2/5 =
  8. 8.6/7 − 1/4 =
  9. 9.9/10 − 4/5 =
  10. 10.9/10 − 1/5 =
  11. 11.6/7 − 3/4 =
  12. 12.A bottle has 7/10 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 7/8 litre of juice. Aarav drinks 5/6 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 3/4 litre of juice. Ishaan drinks 2/5 litre. How much juice is left (in litres)? =
  15. 15.2/3 − 3/7 =
  16. 16.4/5 − 1/10 =
  17. 17.8/9 − 1/2 =
  18. 18.2/3 − 1/9 =
  19. 19.1/6 − 1/10 =
  20. 20.5/6 − 1/10 =
  21. 21.1/4 − 1/10 =
  22. 22.Kabir has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  23. 23.4/5 − 1/4 =
  24. 24.3/5 − 3/10 =
  25. 25.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  26. 26.5/6 − 4/9 =
  27. 27.2/3 − 4/7 =
  28. 28.1/6 − 1/9 =
  29. 29.2/9 − 1/6 =
  30. 30.Meera has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  31. 31.5/7 − 1/4 =
  32. 32.A bottle has 7/10 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  33. 33.Riya has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  34. 34.1/2 − 1/5 =
  35. 35.3/10 − 1/4 =
  36. 36.5/6 − 2/9 =
  37. 37.1/2 − 4/9 =
  38. 38.A bottle has 3/5 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  39. 39.3/5 − 1/4 =
  40. 40.1/2 − 2/9 =

Answer key

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

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