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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 820 · 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. 1.2/5 − 1/4 =
  2. 2.Riya has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  3. 3.3/4 − 1/2 =
  4. 4.7/9 − 1/2 =
  5. 5.Meera has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  6. 6.4/5 − 7/10 =
  7. 7.1/4 − 1/10 =
  8. 8.Aarav has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  9. 9.1/3 − 1/9 =
  10. 10.2/3 − 2/5 =
  11. 11.3/4 − 5/7 =
  12. 12.A bottle has 1/2 litre of juice. Vihaan drinks 3/8 litre. How much juice is left (in litres)? =
  13. 13.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? =
  14. 14.7/9 − 2/3 =
  15. 15.A bottle has 3/8 litre of juice. Anaya drinks 1/4 litre. How much juice is left (in litres)? =
  16. 16.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  17. 17.5/8 − 1/4 =
  18. 18.Rohan has a ribbon 1/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  19. 19.Rohan has a ribbon 8/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  20. 20.8/9 − 1/3 =
  21. 21.A bottle has 7/8 litre of juice. Kabir drinks 5/6 litre. How much juice is left (in litres)? =
  22. 22.4/5 − 1/4 =
  23. 23.1/5 − 1/10 =
  24. 24.A tank is 2/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  25. 25.Aarav has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  26. 26.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  27. 27.A bottle has 5/6 litre of juice. Anaya drinks 4/9 litre. How much juice is left (in litres)? =
  28. 28.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? =
  29. 29.7/8 − 1/6 =
  30. 30.2/5 − 1/10 =
  31. 31.A bottle has 7/9 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  32. 32.5/8 − 1/3 =
  33. 33.A bottle has 5/6 litre of juice. Anaya drinks 5/8 litre. How much juice is left (in litres)? =
  34. 34.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  35. 35.Sara has a ribbon 5/6 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  36. 36.4/5 − 3/10 =
  37. 37.5/6 − 4/5 =
  38. 38.3/10 − 1/4 =
  39. 39.3/4 − 4/7 =
  40. 40.A bottle has 8/9 litre of juice. Sara drinks 5/6 litre. How much juice is left (in litres)? =

Answer key

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

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