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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 339 · 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. 1.9/10 − 1/5 =
  2. 2.7/8 − 1/4 =
  3. 3.2/3 − 2/9 =
  4. 4.Meera has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  5. 5.1/4 − 1/7 =
  6. 6.4/7 − 1/3 =
  7. 7.1/2 − 2/7 =
  8. 8.Meera has a ribbon 5/6 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  9. 9.9/10 − 1/3 =
  10. 10.7/8 − 1/3 =
  11. 11.3/4 − 3/8 =
  12. 12.Meera has a ribbon 3/4 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  13. 13.1/2 − 1/7 =
  14. 14.A bottle has 1/2 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  15. 15.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  16. 16.7/9 − 1/2 =
  17. 17.5/9 − 1/3 =
  18. 18.2/5 − 1/6 =
  19. 19.A bottle has 2/5 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  20. 20.Kabir has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  21. 21.6/7 − 3/4 =
  22. 22.A bottle has 5/6 litre of juice. Meera drinks 7/10 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 6/7 litre of juice. Diya drinks 2/3 litre. How much juice is left (in litres)? =
  24. 24.2/3 − 5/8 =
  25. 25.3/5 − 3/10 =
  26. 26.A bottle has 1/2 litre of juice. Ishaan drinks 2/7 litre. How much juice is left (in litres)? =
  27. 27.Meera has a ribbon 3/4 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  28. 28.1/3 − 3/10 =
  29. 29.3/4 − 1/7 =
  30. 30.5/6 − 4/9 =
  31. 31.4/9 − 1/3 =
  32. 32.A tank is 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  33. 33.A tank is 1/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  34. 34.A tank is 1/2 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  35. 35.Anaya has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  36. 36.A bottle has 4/5 litre of juice. Anaya drinks 3/10 litre. How much juice is left (in litres)? =
  37. 37.2/5 − 1/10 =
  38. 38.1/6 − 1/10 =
  39. 39.Aarav has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  40. 40.5/6 − 5/9 =

Answer key

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

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