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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 563 · 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. 1.2/3 − 1/7 =
  2. 2.3/4 − 1/8 =
  3. 3.5/6 − 3/10 =
  4. 4.3/4 − 1/2 =
  5. 5.3/4 − 4/7 =
  6. 6.2/3 − 2/5 =
  7. 7.Meera has a ribbon 3/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  8. 8.9/10 − 3/5 =
  9. 9.1/6 − 1/9 =
  10. 10.6/7 − 1/4 =
  11. 11.A bottle has 1/2 litre of juice. Rohan drinks 1/4 litre. How much juice is left (in litres)? =
  12. 12.Meera has a ribbon 1/2 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  13. 13.A tank is 4/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  14. 14.4/5 − 7/10 =
  15. 15.5/8 − 1/6 =
  16. 16.A tank is 2/3 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  17. 17.A tank is 5/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  18. 18.7/8 − 5/6 =
  19. 19.6/7 − 1/2 =
  20. 20.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  21. 21.9/10 − 1/3 =
  22. 22.1/2 − 2/7 =
  23. 23.4/7 − 1/2 =
  24. 24.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  25. 25.3/4 − 2/5 =
  26. 26.A bottle has 4/5 litre of juice. Arjun drinks 3/4 litre. How much juice is left (in litres)? =
  27. 27.A bottle has 1/2 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  28. 28.5/9 − 1/6 =
  29. 29.1/3 − 2/9 =
  30. 30.A bottle has 3/5 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  31. 31.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  32. 32.2/5 − 1/4 =
  33. 33.Vihaan has a ribbon 7/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 7/10 litre of juice. Meera drinks 3/5 litre. How much juice is left (in litres)? =
  35. 35.4/5 − 1/2 =
  36. 36.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? =
  37. 37.1/3 − 1/8 =
  38. 38.Meera has a ribbon 2/3 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  39. 39.7/10 − 2/5 =
  40. 40.A bottle has 2/5 litre of juice. Aarav drinks 1/10 litre. How much juice is left (in litres)? =

Answer key

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

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