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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 278 · 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. 1.1/4 − 1/8 =
  2. 2.Ishaan has a ribbon 4/5 m long and cuts off 7/10 m. How long is the ribbon now (in m)? =
  3. 3.3/4 − 3/5 =
  4. 4.A bottle has 1/3 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  5. 5.5/6 − 3/5 =
  6. 6.1/3 − 1/4 =
  7. 7.4/5 − 7/10 =
  8. 8.4/5 − 2/3 =
  9. 9.1/2 − 2/9 =
  10. 10.A bottle has 5/8 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  11. 11.A tank is 5/6 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  12. 12.5/7 − 2/3 =
  13. 13.Riya has a ribbon 5/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  14. 14.1/3 − 2/9 =
  15. 15.A bottle has 5/7 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  16. 16.Tara has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  17. 17.1/2 − 2/7 =
  18. 18.3/4 − 3/10 =
  19. 19.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.2/3 − 1/9 =
  21. 21.A tank is 4/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  22. 22.6/7 − 1/3 =
  23. 23.A bottle has 1/3 litre of juice. Diya drinks 2/9 litre. How much juice is left (in litres)? =
  24. 24.1/4 − 1/7 =
  25. 25.3/4 − 1/7 =
  26. 26.2/3 − 2/9 =
  27. 27.A bottle has 7/9 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 2/3 litre of juice. Aarav drinks 4/9 litre. How much juice is left (in litres)? =
  29. 29.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  30. 30.A tank is 6/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 2/3 litre of juice. Arjun drinks 2/9 litre. How much juice is left (in litres)? =
  32. 32.5/9 − 1/6 =
  33. 33.Arjun has a ribbon 1/3 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  34. 34.7/10 − 3/5 =
  35. 35.1/2 − 3/10 =
  36. 36.1/2 − 1/8 =
  37. 37.Arjun has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  38. 38.3/4 − 1/3 =
  39. 39.7/9 − 1/6 =
  40. 40.A bottle has 1/2 litre of juice. Riya drinks 4/9 litre. How much juice is left (in litres)? =

Answer key

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

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