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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 715 · 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.A bottle has 1/2 litre of juice. Arjun drinks 3/7 litre. How much juice is left (in litres)? =
  2. 2.A bottle has 8/9 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  3. 3.5/6 − 4/5 =
  4. 4.Tara has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  5. 5.5/7 − 2/3 =
  6. 6.A tank is 7/9 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  7. 7.7/10 − 1/3 =
  8. 8.5/8 − 1/3 =
  9. 9.3/5 − 1/4 =
  10. 10.8/9 − 5/6 =
  11. 11.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  12. 12.A bottle has 3/4 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  13. 13.1/4 − 1/8 =
  14. 14.5/6 − 2/9 =
  15. 15.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? =
  16. 16.7/9 − 1/3 =
  17. 17.9/10 − 3/4 =
  18. 18.1/6 − 1/10 =
  19. 19.1/2 − 4/9 =
  20. 20.2/3 − 3/7 =
  21. 21.Diya has a ribbon 3/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  22. 22.3/4 − 5/8 =
  23. 23.5/6 − 5/8 =
  24. 24.4/9 − 1/3 =
  25. 25.A tank is 5/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  26. 26.9/10 − 5/6 =
  27. 27.1/2 − 3/8 =
  28. 28.A bottle has 6/7 litre of juice. Meera drinks 3/4 litre. How much juice is left (in litres)? =
  29. 29.A bottle has 8/9 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  30. 30.5/9 − 1/2 =
  31. 31.6/7 − 1/2 =
  32. 32.Anaya has a ribbon 5/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  33. 33.2/5 − 1/10 =
  34. 34.2/3 − 2/9 =
  35. 35.1/2 − 3/10 =
  36. 36.5/6 − 7/10 =
  37. 37.5/9 − 1/6 =
  38. 38.2/3 − 3/10 =
  39. 39.3/4 − 1/7 =
  40. 40.7/8 − 1/4 =

Answer key

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

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