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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 252 · 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 − 1/9 =
  2. 2.Kabir has a ribbon 5/6 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  3. 3.1/2 − 4/9 =
  4. 4.2/3 − 1/4 =
  5. 5.Vihaan has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  6. 6.Tara has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  7. 7.8/9 − 5/6 =
  8. 8.2/5 − 3/10 =
  9. 9.5/6 − 2/5 =
  10. 10.2/3 − 1/2 =
  11. 11.1/2 − 2/7 =
  12. 12.A bottle has 7/10 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  13. 13.A bottle has 3/8 litre of juice. Rohan drinks 1/6 litre. How much juice is left (in litres)? =
  14. 14.5/6 − 1/5 =
  15. 15.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  16. 16.8/9 − 1/2 =
  17. 17.A bottle has 4/5 litre of juice. Rohan drinks 2/3 litre. How much juice is left (in litres)? =
  18. 18.1/4 − 1/7 =
  19. 19.3/5 − 3/10 =
  20. 20.4/5 − 1/3 =
  21. 21.6/7 − 1/3 =
  22. 22.A bottle has 5/9 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 1/7 =
  24. 24.Kabir has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  25. 25.A tank is 5/6 full of water. Then water filling 7/9 of the tank is used. What fraction of the tank is full now? =
  26. 26.5/6 − 4/5 =
  27. 27.3/4 − 3/7 =
  28. 28.5/9 − 1/2 =
  29. 29.7/8 − 2/3 =
  30. 30.A bottle has 6/7 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.5/7 − 2/3 =
  32. 32.A bottle has 2/3 litre of juice. Anaya drinks 3/7 litre. How much juice is left (in litres)? =
  33. 33.Diya has a ribbon 7/8 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  34. 34.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? =
  35. 35.Sara has a ribbon 7/8 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  37. 37.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? =
  38. 38.1/2 − 1/8 =
  39. 39.Kabir has a ribbon 2/3 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  40. 40.1/2 − 1/5 =

Answer key

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

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