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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 553 · 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. 1.1/4 − 1/7 =
  2. 2.A bottle has 4/9 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.3/4 − 5/8 =
  4. 4.A bottle has 5/8 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.7/8 − 1/6 =
  6. 6.A bottle has 4/5 litre of juice. Riya drinks 3/10 litre. How much juice is left (in litres)? =
  7. 7.2/3 − 1/7 =
  8. 8.A bottle has 7/10 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  9. 9.Anaya has a ribbon 3/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  10. 10.Sara has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  11. 11.3/4 − 1/10 =
  12. 12.A bottle has 7/8 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  13. 13.3/4 − 1/3 =
  14. 14.Vihaan has a ribbon 1/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  15. 15.Tara has a ribbon 2/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  16. 16.Ishaan has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 2/3 litre of juice. Kabir drinks 1/8 litre. How much juice is left (in litres)? =
  18. 18.1/3 − 1/7 =
  19. 19.5/6 − 1/5 =
  20. 20.3/4 − 4/7 =
  21. 21.A bottle has 7/10 litre of juice. Rohan drinks 3/5 litre. How much juice is left (in litres)? =
  22. 22.3/7 − 1/4 =
  23. 23.5/9 − 1/6 =
  24. 24.1/6 − 1/9 =
  25. 25.9/10 − 1/6 =
  26. 26.7/8 − 3/4 =
  27. 27.9/10 − 2/3 =
  28. 28.5/7 − 2/3 =
  29. 29.A bottle has 2/3 litre of juice. Anaya drinks 4/9 litre. How much juice is left (in litres)? =
  30. 30.3/10 − 1/5 =
  31. 31.Riya has a ribbon 9/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  32. 32.2/3 − 2/5 =
  33. 33.3/5 − 1/4 =
  34. 34.3/4 − 3/7 =
  35. 35.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  36. 36.A tank is 3/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  37. 37.A tank is 2/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  38. 38.Aarav has a ribbon 9/10 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  39. 39.2/3 − 5/8 =
  40. 40.1/3 − 2/7 =

Answer key

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

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