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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 548 · 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 − 2/7 =
  2. 2.5/6 − 2/5 =
  3. 3.A bottle has 6/7 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  4. 4.Riya has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  5. 5.5/8 − 1/6 =
  6. 6.3/10 − 1/4 =
  7. 7.7/8 − 1/6 =
  8. 8.A bottle has 4/7 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  9. 9.7/9 − 2/3 =
  10. 10.2/3 − 2/5 =
  11. 11.5/7 − 1/4 =
  12. 12.A bottle has 1/3 litre of juice. Vihaan drinks 1/7 litre. How much juice is left (in litres)? =
  13. 13.2/5 − 3/10 =
  14. 14.A bottle has 2/5 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  15. 15.3/4 − 2/7 =
  16. 16.8/9 − 1/2 =
  17. 17.2/7 − 1/4 =
  18. 18.4/5 − 7/10 =
  19. 19.5/6 − 5/9 =
  20. 20.3/7 − 1/3 =
  21. 21.3/4 − 1/8 =
  22. 22.A bottle has 1/4 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  23. 23.2/3 − 1/2 =
  24. 24.1/6 − 1/8 =
  25. 25.3/4 − 2/3 =
  26. 26.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? =
  27. 27.A bottle has 1/3 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  28. 28.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  29. 29.A bottle has 3/8 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  30. 30.A tank is 3/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 3/7 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  32. 32.A bottle has 1/2 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 3/4 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 3/4 litre of juice. Ishaan drinks 3/7 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 5/7 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  36. 36.1/2 − 1/5 =
  37. 37.Diya has a ribbon 8/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  38. 38.1/4 − 1/7 =
  39. 39.Aarav has a ribbon 7/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  40. 40.A tank is 3/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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