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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 279 · 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.Vihaan has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  2. 2.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  3. 3.5/7 − 2/3 =
  4. 4.5/7 − 1/2 =
  5. 5.A bottle has 7/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.5/6 − 4/5 =
  7. 7.5/6 − 5/9 =
  8. 8.2/9 − 1/6 =
  9. 9.7/10 − 1/5 =
  10. 10.2/3 − 3/8 =
  11. 11.9/10 − 3/5 =
  12. 12.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  13. 13.7/9 − 1/2 =
  14. 14.A bottle has 3/5 litre of juice. Anaya drinks 3/10 litre. How much juice is left (in litres)? =
  15. 15.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  16. 16.A bottle has 2/3 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =
  17. 17.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  18. 18.A bottle has 2/3 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  19. 19.5/9 − 1/6 =
  20. 20.5/6 − 1/10 =
  21. 21.3/7 − 1/3 =
  22. 22.4/5 − 2/3 =
  23. 23.1/4 − 1/6 =
  24. 24.2/3 − 2/9 =
  25. 25.A tank is 3/4 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  26. 26.8/9 − 1/2 =
  27. 27.8/9 − 1/3 =
  28. 28.Vihaan has a ribbon 5/6 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  29. 29.5/6 − 2/5 =
  30. 30.Meera has a ribbon 3/4 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  31. 31.3/7 − 1/4 =
  32. 32.A bottle has 7/10 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 2/5 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  34. 34.4/7 − 1/4 =
  35. 35.A bottle has 2/3 litre of juice. Ishaan drinks 4/7 litre. How much juice is left (in litres)? =
  36. 36.1/2 − 1/7 =
  37. 37.4/7 − 1/3 =
  38. 38.A bottle has 6/7 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  39. 39.3/10 − 1/4 =
  40. 40.Diya has a ribbon 3/4 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =

Answer key

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

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