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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 108 · 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.A tank is 2/3 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  2. 2.2/3 − 1/4 =
  3. 3.3/7 − 1/4 =
  4. 4.Meera has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  5. 5.6/7 − 2/3 =
  6. 6.A tank is 4/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.8/9 − 5/6 =
  8. 8.3/4 − 1/10 =
  9. 9.5/7 − 1/4 =
  10. 10.1/2 − 1/9 =
  11. 11.2/3 − 3/7 =
  12. 12.2/3 − 2/7 =
  13. 13.8/9 − 1/6 =
  14. 14.7/9 − 1/2 =
  15. 15.7/10 − 2/5 =
  16. 16.A bottle has 5/7 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  17. 17.4/9 − 1/6 =
  18. 18.Aarav has a ribbon 7/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  20. 20.7/9 − 1/3 =
  21. 21.A bottle has 3/4 litre of juice. Ishaan drinks 7/10 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 9/10 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  23. 23.Rohan has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  24. 24.5/6 − 3/5 =
  25. 25.A bottle has 1/3 litre of juice. Arjun drinks 1/7 litre. How much juice is left (in litres)? =
  26. 26.2/3 − 3/8 =
  27. 27.9/10 − 2/5 =
  28. 28.7/9 − 2/3 =
  29. 29.3/4 − 5/7 =
  30. 30.A bottle has 2/3 litre of juice. Ishaan drinks 5/9 litre. How much juice is left (in litres)? =
  31. 31.5/6 − 4/9 =
  32. 32.2/9 − 1/6 =
  33. 33.4/5 − 3/4 =
  34. 34.A bottle has 2/3 litre of juice. Vihaan drinks 5/8 litre. How much juice is left (in litres)? =
  35. 35.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? =
  36. 36.6/7 − 1/3 =
  37. 37.Kabir has a ribbon 7/10 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 7/10 litre of juice. Tara drinks 2/5 litre. How much juice is left (in litres)? =
  39. 39.A bottle has 1/3 litre of juice. Vihaan drinks 1/7 litre. How much juice is left (in litres)? =
  40. 40.7/10 − 1/3 =

Answer key

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

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