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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 358 · 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. 1.7/10 − 2/5 =
  2. 2.Sara has a ribbon 3/4 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  3. 3.3/7 − 1/3 =
  4. 4.5/8 − 1/3 =
  5. 5.Ishaan has a ribbon 2/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 4/5 litre of juice. Riya drinks 3/4 litre. How much juice is left (in litres)? =
  7. 7.7/9 − 1/2 =
  8. 8.2/3 − 5/9 =
  9. 9.5/6 − 1/2 =
  10. 10.2/5 − 1/4 =
  11. 11.3/4 − 5/8 =
  12. 12.5/8 − 1/6 =
  13. 13.A bottle has 2/9 litre of juice. Sara drinks 1/6 litre. How much juice is left (in litres)? =
  14. 14.5/7 − 1/4 =
  15. 15.4/5 − 1/10 =
  16. 16.1/2 − 2/9 =
  17. 17.Tara has a ribbon 5/6 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  18. 18.A bottle has 4/5 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  19. 19.A bottle has 8/9 litre of juice. Aarav drinks 1/3 litre. How much juice is left (in litres)? =
  20. 20.A bottle has 4/5 litre of juice. Meera drinks 3/4 litre. How much juice is left (in litres)? =
  21. 21.2/3 − 4/9 =
  22. 22.A tank is 1/4 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  23. 23.7/9 − 1/6 =
  24. 24.Diya has a ribbon 5/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  25. 25.1/3 − 1/9 =
  26. 26.A tank is 1/3 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  27. 27.6/7 − 2/3 =
  28. 28.Kabir has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  29. 29.9/10 − 5/6 =
  30. 30.5/9 − 1/2 =
  31. 31.4/9 − 1/6 =
  32. 32.7/10 − 1/5 =
  33. 33.2/7 − 1/4 =
  34. 34.A bottle has 7/8 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  35. 35.2/3 − 3/8 =
  36. 36.6/7 − 3/4 =
  37. 37.5/7 − 1/3 =
  38. 38.6/7 − 1/4 =
  39. 39.A tank is 1/2 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  40. 40.1/3 − 2/7 =

Answer key

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

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