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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 669 · 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 − 1/3 =
  2. 2.A bottle has 5/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 5/6 litre of juice. Kabir drinks 3/10 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 1/3 litre of juice. Ishaan drinks 2/9 litre. How much juice is left (in litres)? =
  5. 5.1/2 − 1/7 =
  6. 6.7/10 − 1/2 =
  7. 7.Rohan has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  8. 8.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.A tank is 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  10. 10.5/8 − 1/4 =
  11. 11.6/7 − 1/2 =
  12. 12.5/6 − 1/9 =
  13. 13.Sara has a ribbon 9/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  14. 14.5/9 − 1/2 =
  15. 15.A bottle has 9/10 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  16. 16.5/6 − 5/8 =
  17. 17.9/10 − 3/5 =
  18. 18.Aarav has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  19. 19.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  20. 20.5/6 − 2/9 =
  21. 21.6/7 − 1/3 =
  22. 22.3/4 − 1/8 =
  23. 23.4/5 − 2/3 =
  24. 24.5/6 − 1/8 =
  25. 25.A bottle has 8/9 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  26. 26.2/3 − 2/7 =
  27. 27.2/3 − 1/5 =
  28. 28.Riya has a ribbon 9/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  29. 29.5/6 − 3/5 =
  30. 30.1/5 − 1/6 =
  31. 31.3/10 − 1/5 =
  32. 32.3/5 − 1/6 =
  33. 33.A tank is 3/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  34. 34.3/4 − 3/10 =
  35. 35.5/9 − 1/3 =
  36. 36.2/3 − 3/5 =
  37. 37.A tank is 2/3 full of water. Then water filling 5/9 of the tank is used. What fraction of the tank is full now? =
  38. 38.A tank is 1/2 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  39. 39.4/5 − 1/10 =
  40. 40.A bottle has 9/10 litre of juice. Meera drinks 2/5 litre. How much juice is left (in litres)? =

Answer key

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

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