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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 286 · 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 2/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  3. 3.8/9 − 5/6 =
  4. 4.A tank is 5/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  5. 5.Rohan has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  6. 6.1/3 − 1/9 =
  7. 7.5/6 − 2/5 =
  8. 8.A tank is 2/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.2/5 − 1/10 =
  10. 10.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? =
  11. 11.8/9 − 1/3 =
  12. 12.3/4 − 3/8 =
  13. 13.A bottle has 1/2 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  14. 14.4/5 − 1/6 =
  15. 15.A tank is 2/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  16. 16.2/5 − 1/3 =
  17. 17.2/3 − 3/7 =
  18. 18.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  19. 19.A bottle has 3/4 litre of juice. Anaya drinks 3/8 litre. How much juice is left (in litres)? =
  20. 20.2/3 − 1/4 =
  21. 21.Rohan has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  22. 22.A bottle has 8/9 litre of juice. Sara drinks 5/6 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 3/8 =
  24. 24.5/6 − 3/4 =
  25. 25.A bottle has 7/8 litre of juice. Aarav drinks 3/4 litre. How much juice is left (in litres)? =
  26. 26.A bottle has 2/5 litre of juice. Anaya drinks 3/10 litre. How much juice is left (in litres)? =
  27. 27.7/8 − 1/4 =
  28. 28.2/3 − 4/9 =
  29. 29.7/9 − 1/3 =
  30. 30.A bottle has 9/10 litre of juice. Vihaan drinks 3/4 litre. How much juice is left (in litres)? =
  31. 31.3/5 − 1/4 =
  32. 32.Tara has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  33. 33.3/5 − 1/6 =
  34. 34.A bottle has 9/10 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  35. 35.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  36. 36.A bottle has 8/9 litre of juice. Vihaan drinks 5/6 litre. How much juice is left (in litres)? =
  37. 37.1/4 − 1/5 =
  38. 38.1/2 − 1/6 =
  39. 39.5/6 − 4/5 =
  40. 40.A bottle has 8/9 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =

Answer key

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

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