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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 48 · 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. 1.5/7 − 1/2 =
  2. 2.5/8 − 1/4 =
  3. 3.7/8 − 1/2 =
  4. 4.5/6 − 1/10 =
  5. 5.A bottle has 1/4 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  6. 6.8/9 − 1/3 =
  7. 7.1/4 − 1/7 =
  8. 8.A bottle has 3/7 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  9. 9.A bottle has 2/3 litre of juice. Sara drinks 4/9 litre. How much juice is left (in litres)? =
  10. 10.9/10 − 3/5 =
  11. 11.Rohan has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  12. 12.A bottle has 2/5 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =
  13. 13.9/10 − 2/3 =
  14. 14.A bottle has 4/7 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  15. 15.2/7 − 1/4 =
  16. 16.1/2 − 1/5 =
  17. 17.4/5 − 1/2 =
  18. 18.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  19. 19.2/3 − 1/9 =
  20. 20.A bottle has 1/2 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  21. 21.3/4 − 2/5 =
  22. 22.A bottle has 5/9 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.7/10 − 1/6 =
  24. 24.Tara has a ribbon 2/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  25. 25.A tank is 3/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  26. 26.5/9 − 1/6 =
  27. 27.A bottle has 1/3 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 1/3 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  29. 29.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  30. 30.3/4 − 3/7 =
  31. 31.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? =
  32. 32.4/7 − 1/4 =
  33. 33.5/9 − 1/2 =
  34. 34.Riya has a ribbon 4/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  35. 35.4/5 − 3/4 =
  36. 36.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  37. 37.A bottle has 1/3 litre of juice. Tara drinks 1/5 litre. How much juice is left (in litres)? =
  38. 38.5/6 − 1/9 =
  39. 39.2/3 − 4/9 =
  40. 40.5/6 − 5/9 =

Answer key

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

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