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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 83 · 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.Meera has a ribbon 1/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  2. 2.Kabir has a ribbon 3/8 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  3. 3.2/3 − 2/9 =
  4. 4.2/3 − 1/8 =
  5. 5.3/5 − 1/3 =
  6. 6.4/9 − 1/3 =
  7. 7.2/3 − 5/9 =
  8. 8.9/10 − 3/4 =
  9. 9.5/6 − 5/9 =
  10. 10.3/8 − 1/4 =
  11. 11.9/10 − 1/3 =
  12. 12.2/9 − 1/6 =
  13. 13.3/10 − 1/5 =
  14. 14.A bottle has 7/8 litre of juice. Kabir drinks 5/6 litre. How much juice is left (in litres)? =
  15. 15.3/4 − 1/3 =
  16. 16.A bottle has 1/2 litre of juice. Arjun drinks 1/8 litre. How much juice is left (in litres)? =
  17. 17.1/2 − 4/9 =
  18. 18.A bottle has 3/8 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  19. 19.4/5 − 7/10 =
  20. 20.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  21. 21.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  22. 22.Aarav has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  23. 23.9/10 − 5/6 =
  24. 24.A tank is 5/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  25. 25.7/10 − 1/2 =
  26. 26.5/6 − 2/9 =
  27. 27.A tank is 2/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  28. 28.A bottle has 5/8 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  29. 29.1/3 − 1/6 =
  30. 30.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  31. 31.Rohan has a ribbon 8/9 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  32. 32.A bottle has 5/6 litre of juice. Vihaan drinks 1/8 litre. How much juice is left (in litres)? =
  33. 33.Meera has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  34. 34.5/6 − 1/3 =
  35. 35.3/4 − 5/7 =
  36. 36.A bottle has 2/3 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  37. 37.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? =
  38. 38.A bottle has 9/10 litre of juice. Diya drinks 3/4 litre. How much juice is left (in litres)? =
  39. 39.7/10 − 2/5 =
  40. 40.5/6 − 7/10 =

Answer key

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

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