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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 139 · 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 − 1/4 =
  2. 2.A tank is 1/3 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  3. 3.A bottle has 5/6 litre of juice. Meera drinks 1/5 litre. How much juice is left (in litres)? =
  4. 4.1/4 − 1/8 =
  5. 5.8/9 − 5/6 =
  6. 6.1/2 − 1/9 =
  7. 7.A bottle has 4/5 litre of juice. Sara drinks 1/10 litre. How much juice is left (in litres)? =
  8. 8.3/4 − 3/5 =
  9. 9.7/10 − 1/6 =
  10. 10.1/4 − 1/10 =
  11. 11.Meera has a ribbon 3/4 m long and cuts off 4/7 m. How long is the ribbon now (in m)? =
  12. 12.A bottle has 1/2 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  13. 13.5/6 − 1/9 =
  14. 14.9/10 − 2/3 =
  15. 15.A bottle has 5/6 litre of juice. Diya drinks 1/10 litre. How much juice is left (in litres)? =
  16. 16.A bottle has 6/7 litre of juice. Vihaan drinks 1/4 litre. How much juice is left (in litres)? =
  17. 17.6/7 − 1/4 =
  18. 18.5/8 − 1/6 =
  19. 19.3/4 − 7/10 =
  20. 20.A bottle has 1/2 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 9/10 litre of juice. Arjun drinks 4/5 litre. How much juice is left (in litres)? =
  22. 22.Vihaan has a ribbon 4/7 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  23. 23.5/7 − 1/3 =
  24. 24.5/6 − 4/5 =
  25. 25.3/4 − 1/7 =
  26. 26.2/3 − 4/7 =
  27. 27.1/2 − 3/8 =
  28. 28.3/7 − 1/4 =
  29. 29.1/3 − 3/10 =
  30. 30.Vihaan has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 7/8 litre of juice. Vihaan drinks 5/6 litre. How much juice is left (in litres)? =
  32. 32.A tank is 1/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  33. 33.A bottle has 3/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  34. 34.5/6 − 5/9 =
  35. 35.A bottle has 5/6 litre of juice. Kabir drinks 3/5 litre. How much juice is left (in litres)? =
  36. 36.8/9 − 2/3 =
  37. 37.5/6 − 2/5 =
  38. 38.7/10 − 1/4 =
  39. 39.A bottle has 5/6 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  40. 40.3/4 − 5/8 =

Answer key

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

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