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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 82 · 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. 1.9/10 − 3/4 =
  2. 2.1/3 − 1/8 =
  3. 3.7/9 − 1/6 =
  4. 4.7/9 − 1/3 =
  5. 5.1/5 − 1/6 =
  6. 6.9/10 − 4/5 =
  7. 7.3/5 − 1/2 =
  8. 8.3/7 − 1/3 =
  9. 9.A bottle has 5/7 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  10. 10.Anaya has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  11. 11.A bottle has 5/6 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  12. 12.1/3 − 1/5 =
  13. 13.5/6 − 5/9 =
  14. 14.5/6 − 2/3 =
  15. 15.Meera has a ribbon 6/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  16. 16.A bottle has 1/2 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  17. 17.6/7 − 3/4 =
  18. 18.Vihaan has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  19. 19.4/7 − 1/3 =
  20. 20.7/10 − 1/4 =
  21. 21.1/2 − 2/9 =
  22. 22.3/8 − 1/3 =
  23. 23.1/4 − 1/5 =
  24. 24.2/3 − 2/9 =
  25. 25.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  26. 26.A bottle has 2/3 litre of juice. Aarav drinks 3/10 litre. How much juice is left (in litres)? =
  27. 27.2/3 − 2/5 =
  28. 28.Sara has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  29. 29.5/6 − 2/9 =
  30. 30.Vihaan has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  31. 31.5/6 − 3/10 =
  32. 32.A bottle has 3/4 litre of juice. Kabir drinks 5/7 litre. How much juice is left (in litres)? =
  33. 33.Tara has a ribbon 3/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  34. 34.Meera has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  35. 35.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? =
  36. 36.1/2 − 1/3 =
  37. 37.9/10 − 1/6 =
  38. 38.Riya has a ribbon 7/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  39. 39.Diya has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  40. 40.3/5 − 1/6 =

Answer key

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

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