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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 793 · 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.A bottle has 3/7 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  2. 2.A bottle has 2/5 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =
  3. 3.1/4 − 1/5 =
  4. 4.5/6 − 2/3 =
  5. 5.5/8 − 1/2 =
  6. 6.2/3 − 4/7 =
  7. 7.6/7 − 1/4 =
  8. 8.Vihaan has a ribbon 3/4 m long and cuts off 5/8 m. How long is the ribbon now (in m)? =
  9. 9.5/6 − 2/5 =
  10. 10.Kabir has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  11. 11.2/3 − 1/7 =
  12. 12.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  13. 13.Anaya has a ribbon 5/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  14. 14.Aarav has a ribbon 2/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.Sara has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  17. 17.3/4 − 3/5 =
  18. 18.7/8 − 5/6 =
  19. 19.3/4 − 2/7 =
  20. 20.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  21. 21.1/2 − 2/9 =
  22. 22.2/9 − 1/6 =
  23. 23.A bottle has 5/6 litre of juice. Ishaan drinks 2/9 litre. How much juice is left (in litres)? =
  24. 24.9/10 − 5/6 =
  25. 25.A bottle has 7/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 7/8 litre of juice. Anaya drinks 5/6 litre. How much juice is left (in litres)? =
  27. 27.3/4 − 3/8 =
  28. 28.A bottle has 9/10 litre of juice. Meera drinks 2/5 litre. How much juice is left (in litres)? =
  29. 29.2/3 − 3/7 =
  30. 30.3/4 − 3/10 =
  31. 31.7/8 − 2/3 =
  32. 32.3/5 − 1/3 =
  33. 33.Meera has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  34. 34.Vihaan has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  35. 35.Aarav has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  36. 36.7/10 − 3/5 =
  37. 37.3/4 − 2/3 =
  38. 38.4/7 − 1/3 =
  39. 39.A bottle has 2/3 litre of juice. Meera drinks 2/9 litre. How much juice is left (in litres)? =
  40. 40.3/10 − 1/4 =

Answer key

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

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