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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 989 · 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. 1.4/7 − 1/2 =
  2. 2.Vihaan has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  3. 3.4/5 − 3/10 =
  4. 4.A bottle has 2/5 litre of juice. Ishaan drinks 1/6 litre. How much juice is left (in litres)? =
  5. 5.3/4 − 3/7 =
  6. 6.2/3 − 3/8 =
  7. 7.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  8. 8.1/4 − 1/8 =
  9. 9.1/3 − 1/9 =
  10. 10.Anaya has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  11. 11.7/10 − 1/6 =
  12. 12.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  13. 13.1/3 − 1/8 =
  14. 14.7/10 − 1/5 =
  15. 15.A tank is 5/6 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  16. 16.8/9 − 1/3 =
  17. 17.1/4 − 1/7 =
  18. 18.Riya has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  19. 19.9/10 − 1/4 =
  20. 20.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  21. 21.A bottle has 9/10 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.1/3 − 1/5 =
  23. 23.1/3 − 2/7 =
  24. 24.2/3 − 1/10 =
  25. 25.Kabir has a ribbon 1/3 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  26. 26.3/8 − 1/4 =
  27. 27.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  28. 28.1/2 − 1/3 =
  29. 29.5/7 − 2/3 =
  30. 30.4/5 − 7/10 =
  31. 31.Arjun has a ribbon 7/10 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  32. 32.6/7 − 1/4 =
  33. 33.A tank is 9/10 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  34. 34.8/9 − 1/6 =
  35. 35.4/5 − 3/4 =
  36. 36.2/3 − 5/9 =
  37. 37.Arjun has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  38. 38.2/3 − 3/10 =
  39. 39.A bottle has 6/7 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  40. 40.7/9 − 2/3 =

Answer key

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

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