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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 435 · 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. 1.2/3 − 1/7 =
  2. 2.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  3. 3.1/4 − 1/7 =
  4. 4.5/7 − 1/4 =
  5. 5.Vihaan has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 9/10 litre of juice. Ishaan drinks 3/5 litre. How much juice is left (in litres)? =
  7. 7.5/6 − 1/8 =
  8. 8.9/10 − 5/6 =
  9. 9.5/6 − 1/2 =
  10. 10.1/6 − 1/10 =
  11. 11.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  12. 12.1/3 − 1/6 =
  13. 13.6/7 − 1/3 =
  14. 14.A bottle has 3/5 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  15. 15.9/10 − 1/3 =
  16. 16.Kabir has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 1/2 litre of juice. Arjun drinks 4/9 litre. How much juice is left (in litres)? =
  18. 18.7/9 − 1/2 =
  19. 19.Anaya has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  20. 20.7/8 − 1/4 =
  21. 21.4/9 − 1/6 =
  22. 22.4/5 − 1/4 =
  23. 23.3/8 − 1/3 =
  24. 24.3/5 − 1/6 =
  25. 25.4/5 − 7/10 =
  26. 26.3/4 − 3/10 =
  27. 27.Vihaan has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  28. 28.8/9 − 1/2 =
  29. 29.A tank is 5/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.Tara has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  31. 31.9/10 − 1/5 =
  32. 32.5/6 − 5/9 =
  33. 33.4/5 − 1/2 =
  34. 34.3/4 − 1/8 =
  35. 35.5/7 − 1/2 =
  36. 36.A tank is 2/5 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.1/2 − 2/7 =
  38. 38.5/6 − 2/5 =
  39. 39.A bottle has 5/8 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  40. 40.7/8 − 5/6 =

Answer key

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

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