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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 53 · 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 3/4 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  2. 2.Aarav has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  3. 3.4/5 − 1/10 =
  4. 4.A bottle has 3/4 litre of juice. Riya drinks 2/5 litre. How much juice is left (in litres)? =
  5. 5.2/3 − 2/7 =
  6. 6.2/3 − 2/5 =
  7. 7.A tank is 3/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  8. 8.9/10 − 2/5 =
  9. 9.6/7 − 2/3 =
  10. 10.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? =
  11. 11.8/9 − 1/3 =
  12. 12.A bottle has 7/8 litre of juice. Anaya drinks 2/3 litre. How much juice is left (in litres)? =
  13. 13.5/6 − 2/9 =
  14. 14.2/5 − 1/4 =
  15. 15.Tara has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  16. 16.3/4 − 3/8 =
  17. 17.3/4 − 5/7 =
  18. 18.3/7 − 1/3 =
  19. 19.Tara has a ribbon 6/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  20. 20.2/5 − 3/10 =
  21. 21.2/3 − 2/9 =
  22. 22.A bottle has 5/7 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  23. 23.3/5 − 1/4 =
  24. 24.7/9 − 1/3 =
  25. 25.8/9 − 5/6 =
  26. 26.7/8 − 5/6 =
  27. 27.A bottle has 1/4 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  28. 28.Sara has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  29. 29.1/4 − 1/7 =
  30. 30.A bottle has 9/10 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  31. 31.2/3 − 4/9 =
  32. 32.1/3 − 1/7 =
  33. 33.A tank is 1/2 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  34. 34.6/7 − 1/3 =
  35. 35.A bottle has 1/3 litre of juice. Anaya drinks 1/10 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 5/6 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 7/8 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  38. 38.5/6 − 4/9 =
  39. 39.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  40. 40.5/6 − 3/10 =

Answer key

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

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