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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 176 · 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. 1.1/3 − 2/7 =
  2. 2.5/7 − 1/2 =
  3. 3.1/2 − 1/9 =
  4. 4.3/5 − 1/2 =
  5. 5.Meera has a ribbon 3/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 6/7 litre of juice. Arjun drinks 2/3 litre. How much juice is left (in litres)? =
  7. 7.5/9 − 1/6 =
  8. 8.1/4 − 1/5 =
  9. 9.2/3 − 2/9 =
  10. 10.7/10 − 1/2 =
  11. 11.A tank is 1/2 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  12. 12.Anaya has a ribbon 2/3 m long and cuts off 2/7 m. How long is the ribbon now (in m)? =
  13. 13.2/3 − 1/2 =
  14. 14.3/4 − 1/10 =
  15. 15.2/5 − 3/10 =
  16. 16.7/10 − 1/5 =
  17. 17.1/2 − 3/8 =
  18. 18.A tank is 1/2 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  19. 19.5/6 − 1/3 =
  20. 20.9/10 − 3/5 =
  21. 21.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  22. 22.7/8 − 1/3 =
  23. 23.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? =
  24. 24.2/3 − 1/6 =
  25. 25.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? =
  26. 26.Anaya has a ribbon 1/2 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  27. 27.9/10 − 1/2 =
  28. 28.7/10 − 2/3 =
  29. 29.8/9 − 1/2 =
  30. 30.5/7 − 2/3 =
  31. 31.1/2 − 4/9 =
  32. 32.1/5 − 1/10 =
  33. 33.A tank is 1/2 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  34. 34.3/4 − 1/5 =
  35. 35.A bottle has 7/10 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.2/7 − 1/4 =
  37. 37.7/8 − 1/4 =
  38. 38.5/8 − 1/6 =
  39. 39.3/7 − 1/3 =
  40. 40.Meera has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =

Answer key

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

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