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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 593 · 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 − 1/7 =
  2. 2.A bottle has 5/7 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  3. 3.3/10 − 1/6 =
  4. 4.7/10 − 2/5 =
  5. 5.1/3 − 2/9 =
  6. 6.Arjun has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  7. 7.A tank is 4/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  8. 8.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 3/8 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  10. 10.Kabir has a ribbon 9/10 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  11. 11.7/8 − 1/3 =
  12. 12.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 4/5 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.2/9 − 1/6 =
  15. 15.A bottle has 2/3 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  16. 16.1/3 − 2/7 =
  17. 17.A tank is 5/6 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  18. 18.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? =
  19. 19.7/9 − 1/2 =
  20. 20.1/2 − 1/5 =
  21. 21.5/6 − 1/3 =
  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. 23.2/3 − 3/5 =
  24. 24.A bottle has 7/8 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  25. 25.9/10 − 2/3 =
  26. 26.6/7 − 1/2 =
  27. 27.7/9 − 1/3 =
  28. 28.8/9 − 2/3 =
  29. 29.2/3 − 3/7 =
  30. 30.A bottle has 3/5 litre of juice. Rohan drinks 1/10 litre. How much juice is left (in litres)? =
  31. 31.1/3 − 1/10 =
  32. 32.Vihaan has a ribbon 1/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  33. 33.A bottle has 1/2 litre of juice. Sara drinks 1/5 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 3/7 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  35. 35.Sara has a ribbon 6/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  36. 36.2/3 − 5/8 =
  37. 37.A bottle has 1/2 litre of juice. Sara drinks 1/7 litre. How much juice is left (in litres)? =
  38. 38.4/7 − 1/4 =
  39. 39.A bottle has 6/7 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  40. 40.Riya has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =

Answer key

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

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