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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 202 · 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 − 3/7 =
  2. 2.A tank is 1/3 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  3. 3.Riya has a ribbon 2/5 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  4. 4.2/3 − 1/9 =
  5. 5.A tank is 5/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  6. 6.1/2 − 1/9 =
  7. 7.2/3 − 1/7 =
  8. 8.4/7 − 1/2 =
  9. 9.2/5 − 1/6 =
  10. 10.3/8 − 1/6 =
  11. 11.A bottle has 2/3 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  12. 12.7/8 − 1/3 =
  13. 13.5/6 − 3/8 =
  14. 14.Ishaan has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  15. 15.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? =
  16. 16.5/8 − 1/2 =
  17. 17.A bottle has 9/10 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  18. 18.Arjun has a ribbon 2/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  19. 19.3/7 − 1/4 =
  20. 20.A tank is 1/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  21. 21.1/6 − 1/8 =
  22. 22.Kabir has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  23. 23.5/8 − 1/3 =
  24. 24.5/9 − 1/2 =
  25. 25.1/4 − 1/10 =
  26. 26.Ishaan has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  27. 27.8/9 − 2/3 =
  28. 28.1/3 − 1/9 =
  29. 29.2/3 − 1/4 =
  30. 30.1/2 − 1/7 =
  31. 31.5/9 − 1/6 =
  32. 32.A bottle has 1/2 litre of juice. Tara drinks 1/8 litre. How much juice is left (in litres)? =
  33. 33.A bottle has 9/10 litre of juice. Diya drinks 3/5 litre. How much juice is left (in litres)? =
  34. 34.Riya has a ribbon 7/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  35. 35.A bottle has 7/8 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  36. 36.Ishaan has a ribbon 5/6 m long and cuts off 5/9 m. How long is the ribbon now (in m)? =
  37. 37.7/10 − 1/5 =
  38. 38.6/7 − 1/3 =
  39. 39.5/6 − 4/5 =
  40. 40.1/2 − 1/5 =

Answer key

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

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