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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 212 · 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 bottle has 5/7 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  2. 2.Riya has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.1/2 − 2/9 =
  4. 4.Ishaan has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  5. 5.3/8 − 1/4 =
  6. 6.1/2 − 2/7 =
  7. 7.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.9/10 − 1/3 =
  9. 9.7/8 − 1/3 =
  10. 10.3/4 − 1/5 =
  11. 11.Meera has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  12. 12.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  13. 13.2/3 − 2/5 =
  14. 14.1/2 − 1/8 =
  15. 15.A tank is 7/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  16. 16.A tank is 7/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.A bottle has 4/5 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  18. 18.A tank is 7/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  19. 19.5/6 − 4/5 =
  20. 20.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 3/4 litre of juice. Arjun drinks 5/7 litre. How much juice is left (in litres)? =
  22. 22.Ishaan has a ribbon 7/10 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  23. 23.1/2 − 2/5 =
  24. 24.A bottle has 5/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  25. 25.5/7 − 2/3 =
  26. 26.A tank is 4/5 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  27. 27.4/5 − 1/10 =
  28. 28.9/10 − 5/6 =
  29. 29.A bottle has 2/3 litre of juice. Aarav drinks 1/5 litre. How much juice is left (in litres)? =
  30. 30.8/9 − 5/6 =
  31. 31.4/5 − 1/4 =
  32. 32.Rohan has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  33. 33.Meera has a ribbon 1/2 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  34. 34.1/3 − 1/9 =
  35. 35.A bottle has 2/3 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  36. 36.3/4 − 1/2 =
  37. 37.Aarav has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 1/3 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  39. 39.3/5 − 1/3 =
  40. 40.A bottle has 3/8 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

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

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