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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 749 · 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. 1.2/3 − 1/6 =
  2. 2.Meera has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.A tank is 5/6 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  4. 4.2/3 − 1/4 =
  5. 5.Tara has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  6. 6.Diya has a ribbon 1/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  7. 7.2/7 − 1/4 =
  8. 8.5/6 − 1/10 =
  9. 9.A bottle has 1/2 litre of juice. Diya drinks 1/9 litre. How much juice is left (in litres)? =
  10. 10.1/2 − 1/3 =
  11. 11.5/6 − 1/5 =
  12. 12.4/5 − 1/3 =
  13. 13.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  14. 14.Sara has a ribbon 4/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 3/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  16. 16.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  17. 17.5/8 − 1/4 =
  18. 18.A bottle has 3/4 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.2/3 − 5/9 =
  20. 20.A bottle has 7/10 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  21. 21.A tank is 4/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  22. 22.8/9 − 2/3 =
  23. 23.A bottle has 8/9 litre of juice. Diya drinks 1/6 litre. How much juice is left (in litres)? =
  24. 24.A bottle has 7/10 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  25. 25.1/2 − 4/9 =
  26. 26.4/7 − 1/3 =
  27. 27.7/10 − 1/3 =
  28. 28.7/8 − 3/4 =
  29. 29.2/3 − 1/8 =
  30. 30.3/4 − 1/6 =
  31. 31.1/2 − 3/8 =
  32. 32.9/10 − 2/5 =
  33. 33.5/7 − 1/4 =
  34. 34.A bottle has 9/10 litre of juice. Ishaan drinks 3/4 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 2/5 litre of juice. Riya drinks 1/10 litre. How much juice is left (in litres)? =
  36. 36.A bottle has 5/7 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  37. 37.A bottle has 5/9 litre of juice. Ishaan drinks 1/3 litre. How much juice is left (in litres)? =
  38. 38.3/4 − 3/7 =
  39. 39.1/6 − 1/8 =
  40. 40.A tank is 5/6 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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