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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 576 · 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. 1.3/10 − 1/6 =
  2. 2.9/10 − 1/5 =
  3. 3.A bottle has 1/4 litre of juice. Arjun drinks 1/7 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 6/7 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  5. 5.1/3 − 1/8 =
  6. 6.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  7. 7.A bottle has 1/3 litre of juice. Aarav drinks 1/9 litre. How much juice is left (in litres)? =
  8. 8.3/10 − 1/4 =
  9. 9.5/7 − 2/3 =
  10. 10.A bottle has 9/10 litre of juice. Tara drinks 4/5 litre. How much juice is left (in litres)? =
  11. 11.A bottle has 5/6 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  12. 12.9/10 − 2/5 =
  13. 13.3/4 − 5/8 =
  14. 14.5/8 − 1/6 =
  15. 15.Anaya has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  16. 16.3/8 − 1/6 =
  17. 17.Diya has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  18. 18.7/8 − 1/6 =
  19. 19.9/10 − 1/4 =
  20. 20.Anaya has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  21. 21.8/9 − 5/6 =
  22. 22.A bottle has 6/7 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 3/7 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  24. 24.3/4 − 1/10 =
  25. 25.A bottle has 4/7 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  26. 26.Meera has a ribbon 2/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  27. 27.1/2 − 3/7 =
  28. 28.7/10 − 3/5 =
  29. 29.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  30. 30.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  31. 31.Arjun has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  32. 32.Diya has a ribbon 2/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  33. 33.3/4 − 4/7 =
  34. 34.6/7 − 3/4 =
  35. 35.2/3 − 1/9 =
  36. 36.Ishaan has a ribbon 7/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  37. 37.A tank is 5/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.3/4 − 1/7 =
  39. 39.9/10 − 3/4 =
  40. 40.3/4 − 5/7 =

Answer key

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

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