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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 312 · 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 4/7 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  2. 2.Meera has a ribbon 2/3 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  3. 3.4/5 − 2/3 =
  4. 4.A bottle has 5/6 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  5. 5.Meera has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  6. 6.2/3 − 1/7 =
  7. 7.2/9 − 1/6 =
  8. 8.A tank is 7/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.7/8 − 2/3 =
  10. 10.7/9 − 1/6 =
  11. 11.Kabir has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  12. 12.3/4 − 3/10 =
  13. 13.A tank is 6/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  14. 14.6/7 − 2/3 =
  15. 15.A bottle has 2/3 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 2/3 litre of juice. Sara drinks 2/5 litre. How much juice is left (in litres)? =
  17. 17.1/4 − 1/7 =
  18. 18.3/4 − 2/5 =
  19. 19.A bottle has 3/4 litre of juice. Kabir drinks 1/7 litre. How much juice is left (in litres)? =
  20. 20.5/6 − 1/9 =
  21. 21.3/4 − 5/8 =
  22. 22.A bottle has 5/8 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 3/8 =
  24. 24.Riya has a ribbon 3/4 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  25. 25.1/6 − 1/9 =
  26. 26.1/4 − 1/5 =
  27. 27.7/10 − 3/5 =
  28. 28.A bottle has 3/4 litre of juice. Tara drinks 4/7 litre. How much juice is left (in litres)? =
  29. 29.5/7 − 1/2 =
  30. 30.7/9 − 2/3 =
  31. 31.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  32. 32.3/5 − 1/6 =
  33. 33.1/4 − 1/6 =
  34. 34.9/10 − 3/5 =
  35. 35.2/3 − 2/9 =
  36. 36.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? =
  37. 37.1/3 − 1/8 =
  38. 38.A bottle has 9/10 litre of juice. Tara drinks 3/5 litre. How much juice is left (in litres)? =
  39. 39.1/2 − 1/7 =
  40. 40.5/6 − 4/5 =

Answer key

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

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