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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 248 · 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. 1.1/2 − 1/5 =
  2. 2.Meera has a ribbon 3/4 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/3 − 1/4 =
  5. 5.5/6 − 3/10 =
  6. 6.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  7. 7.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? =
  8. 8.1/6 − 1/9 =
  9. 9.2/3 − 2/9 =
  10. 10.8/9 − 1/6 =
  11. 11.9/10 − 4/5 =
  12. 12.7/8 − 2/3 =
  13. 13.A bottle has 8/9 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  14. 14.A bottle has 2/3 litre of juice. Kabir drinks 4/9 litre. How much juice is left (in litres)? =
  15. 15.Ishaan has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  16. 16.4/5 − 1/6 =
  17. 17.3/4 − 5/7 =
  18. 18.7/8 − 1/3 =
  19. 19.5/9 − 1/3 =
  20. 20.A bottle has 2/3 litre of juice. Arjun drinks 3/7 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 1/2 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 5/7 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  23. 23.3/10 − 1/5 =
  24. 24.A bottle has 5/6 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  25. 25.3/8 − 1/3 =
  26. 26.3/7 − 1/3 =
  27. 27.Kabir has a ribbon 4/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  28. 28.3/4 − 5/8 =
  29. 29.A tank is 9/10 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  30. 30.Diya has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  31. 31.2/5 − 3/10 =
  32. 32.3/5 − 3/10 =
  33. 33.A bottle has 3/10 litre of juice. Rohan drinks 1/5 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 1/5 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 4/7 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.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? =
  37. 37.Rohan has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  38. 38.3/4 − 3/10 =
  39. 39.6/7 − 3/4 =
  40. 40.8/9 − 1/2 =

Answer key

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

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