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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 672 · 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. 1.7/8 − 1/2 =
  2. 2.Riya has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 7/10 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  4. 4.7/8 − 1/6 =
  5. 5.A bottle has 5/7 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  6. 6.A bottle has 7/10 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  7. 7.2/3 − 3/7 =
  8. 8.3/4 − 5/7 =
  9. 9.2/5 − 1/3 =
  10. 10.A bottle has 1/3 litre of juice. Diya drinks 1/4 litre. How much juice is left (in litres)? =
  11. 11.1/2 − 1/10 =
  12. 12.A bottle has 5/9 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  13. 13.A tank is 5/6 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  14. 14.9/10 − 1/4 =
  15. 15.3/4 − 3/7 =
  16. 16.2/3 − 1/8 =
  17. 17.5/6 − 4/9 =
  18. 18.Tara has a ribbon 1/3 m long and cuts off 1/7 m. How long is the ribbon now (in m)? =
  19. 19.2/3 − 1/5 =
  20. 20.Arjun has a ribbon 3/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  21. 21.4/5 − 3/10 =
  22. 22.A tank is 3/4 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  23. 23.4/9 − 1/3 =
  24. 24.6/7 − 1/4 =
  25. 25.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  26. 26.Diya has a ribbon 2/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  27. 27.1/5 − 1/10 =
  28. 28.3/10 − 1/5 =
  29. 29.3/4 − 1/7 =
  30. 30.A tank is 3/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  31. 31.A bottle has 4/9 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  32. 32.9/10 − 3/5 =
  33. 33.A tank is 5/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  34. 34.A bottle has 3/5 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  35. 35.Kabir has a ribbon 5/6 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  36. 36.A tank is 1/3 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  37. 37.2/3 − 3/10 =
  38. 38.5/6 − 1/8 =
  39. 39.1/3 − 1/8 =
  40. 40.A bottle has 1/4 litre of juice. Rohan drinks 1/5 litre. How much juice is left (in litres)? =

Answer key

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

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