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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 443 · 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. 1.7/9 − 1/3 =
  2. 2.5/9 − 1/6 =
  3. 3.Tara has a ribbon 5/6 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  4. 4.4/5 − 2/3 =
  5. 5.7/10 − 1/4 =
  6. 6.5/6 − 4/9 =
  7. 7.3/5 − 1/6 =
  8. 8.3/7 − 1/3 =
  9. 9.1/3 − 1/8 =
  10. 10.1/2 − 4/9 =
  11. 11.7/9 − 1/2 =
  12. 12.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.Anaya has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  14. 14.3/4 − 3/7 =
  15. 15.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  16. 16.9/10 − 4/5 =
  17. 17.Diya has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  18. 18.A tank is 3/4 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  19. 19.Riya has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  20. 20.A bottle has 1/3 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  21. 21.Tara has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  22. 22.1/4 − 1/10 =
  23. 23.6/7 − 2/3 =
  24. 24.A bottle has 5/7 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.Diya has a ribbon 1/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  26. 26.2/3 − 1/8 =
  27. 27.A bottle has 7/10 litre of juice. Arjun drinks 1/2 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 5/9 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 9/10 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.A bottle has 4/5 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.7/8 − 1/4 =
  32. 32.A bottle has 1/4 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  33. 33.3/4 − 3/5 =
  34. 34.1/2 − 2/9 =
  35. 35.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  36. 36.Aarav has a ribbon 3/4 m long and cuts off 5/7 m. How long is the ribbon now (in m)? =
  37. 37.3/10 − 1/6 =
  38. 38.Arjun has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  39. 39.2/3 − 1/2 =
  40. 40.A bottle has 3/5 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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