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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 678 · 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. 1.1/5 − 1/6 =
  2. 2.2/5 − 3/10 =
  3. 3.5/7 − 1/2 =
  4. 4.4/5 − 1/10 =
  5. 5.7/9 − 1/6 =
  6. 6.A bottle has 2/5 litre of juice. Anaya drinks 1/10 litre. How much juice is left (in litres)? =
  7. 7.4/5 − 3/10 =
  8. 8.A tank is 5/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  9. 9.5/8 − 1/3 =
  10. 10.4/9 − 1/6 =
  11. 11.3/5 − 1/2 =
  12. 12.1/3 − 2/9 =
  13. 13.4/5 − 2/3 =
  14. 14.5/6 − 1/9 =
  15. 15.A bottle has 5/7 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  16. 16.2/5 − 1/10 =
  17. 17.2/3 − 1/5 =
  18. 18.A bottle has 7/9 litre of juice. Aarav drinks 1/2 litre. How much juice is left (in litres)? =
  19. 19.3/7 − 1/3 =
  20. 20.1/2 − 4/9 =
  21. 21.7/8 − 2/3 =
  22. 22.Diya has a ribbon 3/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  23. 23.A bottle has 4/5 litre of juice. Meera drinks 3/4 litre. How much juice is left (in litres)? =
  24. 24.A tank is 5/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  25. 25.2/5 − 1/6 =
  26. 26.A bottle has 7/8 litre of juice. Vihaan drinks 5/6 litre. How much juice is left (in litres)? =
  27. 27.A bottle has 1/3 litre of juice. Arjun drinks 2/7 litre. How much juice is left (in litres)? =
  28. 28.A bottle has 2/3 litre of juice. Tara drinks 5/8 litre. How much juice is left (in litres)? =
  29. 29.Riya has a ribbon 7/10 m long and cuts off 3/5 m. How long is the ribbon now (in m)? =
  30. 30.A bottle has 3/4 litre of juice. Kabir drinks 3/5 litre. How much juice is left (in litres)? =
  31. 31.A bottle has 9/10 litre of juice. Anaya drinks 1/2 litre. How much juice is left (in litres)? =
  32. 32.Vihaan has a ribbon 7/10 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  33. 33.4/5 − 1/4 =
  34. 34.5/7 − 2/3 =
  35. 35.A tank is 5/6 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  36. 36.5/8 − 1/4 =
  37. 37.Anaya has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  38. 38.1/4 − 1/7 =
  39. 39.Ishaan has a ribbon 1/2 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  40. 40.7/10 − 2/3 =

Answer key

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

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