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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 7 · 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 4/5 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  2. 2.7/8 − 2/3 =
  3. 3.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  4. 4.A tank is 7/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  5. 5.A tank is 7/10 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  6. 6.A bottle has 1/4 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  7. 7.A tank is 2/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  8. 8.7/8 − 1/6 =
  9. 9.5/8 − 1/4 =
  10. 10.3/10 − 1/5 =
  11. 11.2/3 − 3/7 =
  12. 12.1/2 − 1/5 =
  13. 13.2/5 − 1/3 =
  14. 14.6/7 − 1/2 =
  15. 15.A bottle has 5/8 litre of juice. Sara drinks 1/4 litre. How much juice is left (in litres)? =
  16. 16.2/3 − 3/10 =
  17. 17.Kabir has a ribbon 3/10 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  18. 18.7/10 − 1/4 =
  19. 19.3/4 − 3/7 =
  20. 20.8/9 − 1/2 =
  21. 21.Vihaan has a ribbon 7/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  22. 22.5/7 − 2/3 =
  23. 23.3/7 − 1/4 =
  24. 24.6/7 − 2/3 =
  25. 25.Rohan has a ribbon 1/4 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  26. 26.3/4 − 5/7 =
  27. 27.4/5 − 7/10 =
  28. 28.Kabir has a ribbon 4/9 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  29. 29.9/10 − 1/4 =
  30. 30.1/2 − 3/10 =
  31. 31.6/7 − 1/3 =
  32. 32.1/3 − 1/8 =
  33. 33.4/5 − 1/6 =
  34. 34.1/2 − 2/9 =
  35. 35.5/6 − 3/5 =
  36. 36.3/5 − 3/10 =
  37. 37.Aarav has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  38. 38.A bottle has 9/10 litre of juice. Meera drinks 2/5 litre. How much juice is left (in litres)? =
  39. 39.7/8 − 1/3 =
  40. 40.2/9 − 1/6 =

Answer key

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

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