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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 790 · 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. 1.9/10 − 2/5 =
  2. 2.Aarav has a ribbon 9/10 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  3. 3.A bottle has 1/2 litre of juice. Ishaan drinks 1/7 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 1/2 litre of juice. Vihaan drinks 1/5 litre. How much juice is left (in litres)? =
  5. 5.A bottle has 7/9 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  6. 6.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? =
  7. 7.1/3 − 1/4 =
  8. 8.5/6 − 7/10 =
  9. 9.4/5 − 3/10 =
  10. 10.7/10 − 2/5 =
  11. 11.1/4 − 1/6 =
  12. 12.A tank is 1/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  13. 13.A bottle has 3/8 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  14. 14.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  15. 15.2/3 − 1/8 =
  16. 16.Diya has a ribbon 3/4 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  17. 17.5/6 − 1/10 =
  18. 18.2/3 − 3/7 =
  19. 19.A bottle has 3/7 litre of juice. Meera drinks 1/4 litre. How much juice is left (in litres)? =
  20. 20.4/5 − 1/4 =
  21. 21.2/5 − 1/3 =
  22. 22.Ishaan has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  23. 23.2/3 − 1/6 =
  24. 24.1/5 − 1/10 =
  25. 25.A tank is 4/5 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  26. 26.8/9 − 2/3 =
  27. 27.1/2 − 1/6 =
  28. 28.Kabir has a ribbon 5/9 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  29. 29.1/4 − 1/10 =
  30. 30.Aarav has a ribbon 1/4 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  31. 31.2/3 − 2/7 =
  32. 32.7/10 − 1/2 =
  33. 33.9/10 − 5/6 =
  34. 34.7/9 − 1/2 =
  35. 35.6/7 − 1/2 =
  36. 36.3/4 − 1/7 =
  37. 37.3/5 − 1/4 =
  38. 38.1/2 − 1/9 =
  39. 39.A bottle has 6/7 litre of juice. Tara drinks 1/4 litre. How much juice is left (in litres)? =
  40. 40.A bottle has 9/10 litre of juice. Riya drinks 4/5 litre. How much juice is left (in litres)? =

Answer key

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

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