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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 74 · 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. 1.3/7 − 1/4 =
  2. 2.2/3 − 4/9 =
  3. 3.1/2 − 2/5 =
  4. 4.3/4 − 7/10 =
  5. 5.1/4 − 1/8 =
  6. 6.7/8 − 1/6 =
  7. 7.4/5 − 1/10 =
  8. 8.5/9 − 1/2 =
  9. 9.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  10. 10.A bottle has 5/8 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  11. 11.2/3 − 5/9 =
  12. 12.5/7 − 2/3 =
  13. 13.Vihaan has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  14. 14.6/7 − 3/4 =
  15. 15.2/7 − 1/4 =
  16. 16.5/7 − 1/3 =
  17. 17.Arjun has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 4/5 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  19. 19.9/10 − 1/3 =
  20. 20.Kabir has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  21. 21.8/9 − 2/3 =
  22. 22.A bottle has 2/3 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  23. 23.A tank is 4/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  24. 24.A tank is 7/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  25. 25.7/9 − 1/6 =
  26. 26.Meera has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  27. 27.A bottle has 3/5 litre of juice. Meera drinks 3/10 litre. How much juice is left (in litres)? =
  28. 28.Ishaan has a ribbon 1/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  29. 29.A bottle has 9/10 litre of juice. Ishaan drinks 1/5 litre. How much juice is left (in litres)? =
  30. 30.5/6 − 7/9 =
  31. 31.Meera has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  32. 32.1/5 − 1/10 =
  33. 33.A tank is 6/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  34. 34.7/9 − 1/2 =
  35. 35.Aarav has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  36. 36.9/10 − 2/3 =
  37. 37.5/6 − 4/5 =
  38. 38.3/10 − 1/5 =
  39. 39.4/7 − 1/3 =
  40. 40.2/3 − 1/7 =

Answer key

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

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