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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 164 · 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.A bottle has 3/5 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  2. 2.4/5 − 7/10 =
  3. 3.A bottle has 7/10 litre of juice. Kabir drinks 3/5 litre. How much juice is left (in litres)? =
  4. 4.7/8 − 1/2 =
  5. 5.Tara has a ribbon 3/4 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  6. 6.A tank is 2/3 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  7. 7.4/5 − 1/4 =
  8. 8.A bottle has 2/5 litre of juice. Riya drinks 1/4 litre. How much juice is left (in litres)? =
  9. 9.5/8 − 1/2 =
  10. 10.6/7 − 2/3 =
  11. 11.1/3 − 2/7 =
  12. 12.7/8 − 2/3 =
  13. 13.A bottle has 9/10 litre of juice. Riya drinks 1/5 litre. How much juice is left (in litres)? =
  14. 14.1/3 − 1/8 =
  15. 15.1/2 − 4/9 =
  16. 16.1/2 − 1/4 =
  17. 17.1/4 − 1/7 =
  18. 18.Aarav has a ribbon 6/7 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  19. 19.1/2 − 1/6 =
  20. 20.2/7 − 1/4 =
  21. 21.A bottle has 3/5 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  22. 22.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? =
  23. 23.3/7 − 1/4 =
  24. 24.1/3 − 1/7 =
  25. 25.5/6 − 4/9 =
  26. 26.Rohan has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  27. 27.1/5 − 1/10 =
  28. 28.Sara has a ribbon 8/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  29. 29.4/5 − 1/3 =
  30. 30.A bottle has 5/6 litre of juice. Ishaan drinks 1/9 litre. How much juice is left (in litres)? =
  31. 31.A bottle has 8/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.4/9 − 1/6 =
  33. 33.5/9 − 1/3 =
  34. 34.4/7 − 1/4 =
  35. 35.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  36. 36.5/6 − 4/5 =
  37. 37.1/2 − 3/8 =
  38. 38.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? =
  39. 39.Rohan has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  40. 40.A bottle has 1/2 litre of juice. Sara drinks 4/9 litre. How much juice is left (in litres)? =

Answer key

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

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