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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 391 · 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.Kabir has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  2. 2.A tank is 7/8 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  3. 3.5/6 − 1/4 =
  4. 4.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  5. 5.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  6. 6.A bottle has 2/5 litre of juice. Diya drinks 3/10 litre. How much juice is left (in litres)? =
  7. 7.7/8 − 1/4 =
  8. 8.5/6 − 1/2 =
  9. 9.A bottle has 4/5 litre of juice. Anaya drinks 1/3 litre. How much juice is left (in litres)? =
  10. 10.3/7 − 1/3 =
  11. 11.Tara has a ribbon 5/6 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  12. 12.7/10 − 1/4 =
  13. 13.9/10 − 2/5 =
  14. 14.Diya has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.9/10 − 3/4 =
  17. 17.2/5 − 1/10 =
  18. 18.Arjun has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  19. 19.3/5 − 1/3 =
  20. 20.1/4 − 1/6 =
  21. 21.1/4 − 1/7 =
  22. 22.3/4 − 3/5 =
  23. 23.4/5 − 1/6 =
  24. 24.7/9 − 2/3 =
  25. 25.1/3 − 1/4 =
  26. 26.5/6 − 7/10 =
  27. 27.4/7 − 1/4 =
  28. 28.7/9 − 1/6 =
  29. 29.9/10 − 1/5 =
  30. 30.A bottle has 3/10 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  31. 31.1/3 − 1/7 =
  32. 32.A tank is 7/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  33. 33.A bottle has 5/6 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 3/4 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  35. 35.4/5 − 3/4 =
  36. 36.3/4 − 1/10 =
  37. 37.1/2 − 2/5 =
  38. 38.5/8 − 1/4 =
  39. 39.5/7 − 1/4 =
  40. 40.3/4 − 3/8 =

Answer key

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

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