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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 291 · 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. 1.5/8 − 1/2 =
  2. 2.3/5 − 1/3 =
  3. 3.Rohan has a ribbon 2/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  4. 4.3/4 − 4/7 =
  5. 5.Aarav has a ribbon 1/2 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 2/5 litre of juice. Anaya drinks 3/10 litre. How much juice is left (in litres)? =
  7. 7.A bottle has 1/4 litre of juice. Diya drinks 1/5 litre. How much juice is left (in litres)? =
  8. 8.4/5 − 7/10 =
  9. 9.7/8 − 2/3 =
  10. 10.1/4 − 1/5 =
  11. 11.1/6 − 1/9 =
  12. 12.A bottle has 5/6 litre of juice. Meera drinks 5/9 litre. How much juice is left (in litres)? =
  13. 13.A tank is 3/4 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  14. 14.A bottle has 7/9 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  15. 15.7/8 − 3/4 =
  16. 16.3/7 − 1/3 =
  17. 17.A tank is 2/3 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  18. 18.6/7 − 1/2 =
  19. 19.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  20. 20.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  21. 21.9/10 − 1/2 =
  22. 22.A bottle has 2/9 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  23. 23.1/3 − 1/9 =
  24. 24.7/10 − 3/5 =
  25. 25.5/6 − 4/9 =
  26. 26.A bottle has 7/8 litre of juice. Sara drinks 3/4 litre. How much juice is left (in litres)? =
  27. 27.5/9 − 1/3 =
  28. 28.7/9 − 2/3 =
  29. 29.A bottle has 5/8 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.3/4 − 1/5 =
  31. 31.A tank is 3/4 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  32. 32.A bottle has 3/4 litre of juice. Vihaan drinks 3/7 litre. How much juice is left (in litres)? =
  33. 33.1/3 − 1/4 =
  34. 34.A bottle has 3/5 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  35. 35.8/9 − 1/6 =
  36. 36.5/7 − 1/3 =
  37. 37.Kabir has a ribbon 4/5 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 5/6 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  39. 39.A bottle has 4/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  40. 40.1/2 − 2/9 =

Answer key

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

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