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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 398 · 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.Rohan has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  2. 2.Diya has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  3. 3.1/2 − 2/5 =
  4. 4.A bottle has 4/9 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.4/7 − 1/4 =
  6. 6.2/3 − 4/9 =
  7. 7.1/4 − 1/5 =
  8. 8.4/5 − 3/4 =
  9. 9.A bottle has 9/10 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  10. 10.7/9 − 2/3 =
  11. 11.5/7 − 1/3 =
  12. 12.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  13. 13.1/5 − 1/6 =
  14. 14.4/5 − 1/3 =
  15. 15.A bottle has 1/2 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 1/2 litre of juice. Anaya drinks 3/7 litre. How much juice is left (in litres)? =
  17. 17.Kabir has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  18. 18.9/10 − 2/5 =
  19. 19.Kabir has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  20. 20.5/8 − 1/6 =
  21. 21.8/9 − 1/2 =
  22. 22.5/6 − 3/5 =
  23. 23.A bottle has 5/7 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  24. 24.5/6 − 7/10 =
  25. 25.7/10 − 1/6 =
  26. 26.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  27. 27.2/3 − 1/6 =
  28. 28.3/5 − 1/4 =
  29. 29.4/9 − 1/6 =
  30. 30.A bottle has 5/9 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  31. 31.3/10 − 1/4 =
  32. 32.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  33. 33.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? =
  34. 34.2/7 − 1/4 =
  35. 35.Vihaan has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  36. 36.8/9 − 1/3 =
  37. 37.Riya has a ribbon 2/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  38. 38.2/3 − 3/10 =
  39. 39.3/5 − 1/3 =
  40. 40.A bottle has 1/2 litre of juice. Ishaan drinks 2/9 litre. How much juice is left (in litres)? =

Answer key

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

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