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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 745 · 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.Aarav has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  2. 2.Aarav has a ribbon 7/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  3. 3.7/8 − 1/6 =
  4. 4.A tank is 7/8 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  5. 5.5/6 − 7/9 =
  6. 6.2/3 − 2/7 =
  7. 7.2/3 − 1/5 =
  8. 8.A bottle has 5/6 litre of juice. Aarav drinks 2/5 litre. How much juice is left (in litres)? =
  9. 9.2/3 − 1/7 =
  10. 10.7/9 − 1/6 =
  11. 11.4/5 − 2/3 =
  12. 12.5/6 − 3/8 =
  13. 13.2/3 − 4/7 =
  14. 14.Diya has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  15. 15.A tank is 6/7 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  16. 16.5/8 − 1/3 =
  17. 17.8/9 − 5/6 =
  18. 18.A bottle has 4/9 litre of juice. Kabir drinks 1/6 litre. How much juice is left (in litres)? =
  19. 19.Meera has a ribbon 3/5 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  20. 20.3/4 − 3/8 =
  21. 21.A bottle has 2/3 litre of juice. Anaya drinks 5/8 litre. How much juice is left (in litres)? =
  22. 22.1/2 − 3/8 =
  23. 23.7/10 − 1/6 =
  24. 24.8/9 − 1/6 =
  25. 25.1/3 − 1/9 =
  26. 26.1/2 − 3/7 =
  27. 27.3/4 − 2/7 =
  28. 28.A tank is 3/4 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  29. 29.A tank is 5/6 full of water. Then water filling 4/5 of the tank is used. What fraction of the tank is full now? =
  30. 30.9/10 − 4/5 =
  31. 31.A tank is 3/10 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  32. 32.5/6 − 1/3 =
  33. 33.1/2 − 1/10 =
  34. 34.5/6 − 4/9 =
  35. 35.A bottle has 3/4 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  36. 36.Kabir has a ribbon 2/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  37. 37.Meera has a ribbon 3/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  38. 38.9/10 − 1/3 =
  39. 39.A bottle has 3/10 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  40. 40.2/5 − 1/3 =

Answer key

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

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