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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 702 · 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. 1.5/7 − 1/3 =
  2. 2.7/10 − 2/3 =
  3. 3.Kabir has a ribbon 4/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  4. 4.Sara has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  5. 5.5/9 − 1/3 =
  6. 6.4/5 − 3/10 =
  7. 7.3/4 − 2/5 =
  8. 8.A bottle has 5/8 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 5/9 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  10. 10.5/6 − 7/10 =
  11. 11.2/9 − 1/6 =
  12. 12.3/10 − 1/5 =
  13. 13.Kabir has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  14. 14.A bottle has 1/4 litre of juice. Rohan drinks 1/7 litre. How much juice is left (in litres)? =
  15. 15.1/6 − 1/9 =
  16. 16.5/6 − 5/8 =
  17. 17.Kabir has a ribbon 5/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  18. 18.Riya has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  19. 19.1/3 − 1/9 =
  20. 20.A bottle has 2/5 litre of juice. Rohan drinks 1/3 litre. How much juice is left (in litres)? =
  21. 21.6/7 − 3/4 =
  22. 22.3/5 − 3/10 =
  23. 23.Rohan has a ribbon 1/2 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  24. 24.1/2 − 4/9 =
  25. 25.A bottle has 5/6 litre of juice. Aarav drinks 7/10 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 4/7 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  27. 27.Arjun has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  28. 28.8/9 − 2/3 =
  29. 29.7/9 − 1/3 =
  30. 30.2/3 − 1/8 =
  31. 31.Tara has a ribbon 5/6 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  32. 32.3/4 − 2/3 =
  33. 33.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  34. 34.4/5 − 1/3 =
  35. 35.Vihaan has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  36. 36.2/3 − 5/8 =
  37. 37.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  38. 38.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  39. 39.5/6 − 1/2 =
  40. 40.4/5 − 1/2 =

Answer key

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

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