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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 106 · 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 tank is 9/10 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  2. 2.1/2 − 2/7 =
  3. 3.1/3 − 1/9 =
  4. 4.2/3 − 1/9 =
  5. 5.5/6 − 3/8 =
  6. 6.Anaya has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  7. 7.3/8 − 1/3 =
  8. 8.3/4 − 2/5 =
  9. 9.A bottle has 1/2 litre of juice. Rohan drinks 1/5 litre. How much juice is left (in litres)? =
  10. 10.2/3 − 4/9 =
  11. 11.4/5 − 1/6 =
  12. 12.Ishaan has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  13. 13.2/3 − 5/8 =
  14. 14.2/5 − 1/4 =
  15. 15.A bottle has 7/10 litre of juice. Arjun drinks 1/5 litre. How much juice is left (in litres)? =
  16. 16.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? =
  17. 17.5/6 − 5/9 =
  18. 18.5/6 − 1/9 =
  19. 19.7/8 − 3/4 =
  20. 20.3/10 − 1/6 =
  21. 21.5/8 − 1/2 =
  22. 22.5/6 − 2/5 =
  23. 23.9/10 − 1/5 =
  24. 24.A bottle has 8/9 litre of juice. Meera drinks 1/2 litre. How much juice is left (in litres)? =
  25. 25.3/5 − 1/4 =
  26. 26.5/6 − 1/10 =
  27. 27.9/10 − 3/5 =
  28. 28.4/7 − 1/4 =
  29. 29.3/4 − 1/3 =
  30. 30.A bottle has 7/10 litre of juice. Tara drinks 1/3 litre. How much juice is left (in litres)? =
  31. 31.8/9 − 1/3 =
  32. 32.8/9 − 1/6 =
  33. 33.6/7 − 1/4 =
  34. 34.A bottle has 3/5 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  35. 35.A tank is 2/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  36. 36.2/5 − 1/3 =
  37. 37.A bottle has 4/5 litre of juice. Vihaan drinks 1/10 litre. How much juice is left (in litres)? =
  38. 38.1/2 − 1/3 =
  39. 39.7/8 − 5/6 =
  40. 40.6/7 − 2/3 =

Answer key

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

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