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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 288 · 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. 1.3/4 − 2/7 =
  2. 2.A bottle has 2/3 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 3/7 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  4. 4.A tank is 1/2 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  5. 5.Sara has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 1/2 litre of juice. Vihaan drinks 1/9 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 2/5 litre of juice. Tara drinks 3/10 litre. How much juice is left (in litres)? =
  8. 8.A tank is 5/6 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  9. 9.7/8 − 1/2 =
  10. 10.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? =
  11. 11.1/2 − 2/5 =
  12. 12.1/2 − 1/7 =
  13. 13.4/5 − 2/3 =
  14. 14.6/7 − 1/3 =
  15. 15.3/8 − 1/3 =
  16. 16.Diya has a ribbon 3/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  17. 17.3/10 − 1/6 =
  18. 18.Meera has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  19. 19.1/2 − 3/7 =
  20. 20.Sara has a ribbon 2/3 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  21. 21.2/5 − 3/10 =
  22. 22.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  23. 23.1/4 − 1/6 =
  24. 24.A tank is 5/6 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  25. 25.5/6 − 1/2 =
  26. 26.5/6 − 4/9 =
  27. 27.5/6 − 7/10 =
  28. 28.A bottle has 9/10 litre of juice. Arjun drinks 4/5 litre. How much juice is left (in litres)? =
  29. 29.Arjun has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  30. 30.9/10 − 2/5 =
  31. 31.1/3 − 2/9 =
  32. 32.A bottle has 5/6 litre of juice. Sara drinks 7/9 litre. How much juice is left (in litres)? =
  33. 33.1/3 − 1/10 =
  34. 34.A bottle has 1/2 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  35. 35.Riya has a ribbon 2/3 m long and cuts off 4/9 m. How long is the ribbon now (in m)? =
  36. 36.2/3 − 3/7 =
  37. 37.2/3 − 4/9 =
  38. 38.Ishaan has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  39. 39.7/9 − 2/3 =
  40. 40.A bottle has 1/2 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =

Answer key

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

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