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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 612 · 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.Riya has a ribbon 9/10 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.2/3 − 1/7 =
  3. 3.1/5 − 1/10 =
  4. 4.5/6 − 2/9 =
  5. 5.3/10 − 1/4 =
  6. 6.Sara has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  7. 7.3/4 − 1/3 =
  8. 8.5/7 − 2/3 =
  9. 9.Kabir has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  10. 10.3/8 − 1/6 =
  11. 11.4/5 − 1/2 =
  12. 12.Anaya has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  13. 13.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  14. 14.1/2 − 1/10 =
  15. 15.1/2 − 3/8 =
  16. 16.A bottle has 5/8 litre of juice. Arjun drinks 1/6 litre. How much juice is left (in litres)? =
  17. 17.Kabir has a ribbon 2/3 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  18. 18.Vihaan has a ribbon 2/3 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  19. 19.A bottle has 3/4 litre of juice. Diya drinks 5/8 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 1/2 litre of juice. Sara drinks 1/9 litre. How much juice is left (in litres)? =
  21. 21.2/5 − 1/10 =
  22. 22.Ishaan has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  23. 23.5/7 − 1/3 =
  24. 24.Meera has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  25. 25.5/6 − 3/4 =
  26. 26.3/4 − 2/5 =
  27. 27.1/5 − 1/6 =
  28. 28.Ishaan has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  29. 29.5/6 − 1/9 =
  30. 30.5/6 − 1/5 =
  31. 31.A bottle has 5/6 litre of juice. Sara drinks 3/8 litre. How much juice is left (in litres)? =
  32. 32.Meera has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 4/5 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  34. 34.8/9 − 1/6 =
  35. 35.4/5 − 2/3 =
  36. 36.7/10 − 2/5 =
  37. 37.5/6 − 4/9 =
  38. 38.7/10 − 1/5 =
  39. 39.3/5 − 3/10 =
  40. 40.A bottle has 2/3 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =

Answer key

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

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