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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 290 · 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 bottle has 3/4 litre of juice. Riya drinks 1/7 litre. How much juice is left (in litres)? =
  2. 2.1/2 − 3/8 =
  3. 3.4/9 − 1/6 =
  4. 4.1/2 − 2/9 =
  5. 5.Riya has a ribbon 5/6 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  6. 6.1/3 − 1/7 =
  7. 7.9/10 − 3/5 =
  8. 8.4/5 − 1/6 =
  9. 9.A bottle has 4/5 litre of juice. Tara drinks 7/10 litre. How much juice is left (in litres)? =
  10. 10.Diya has a ribbon 1/2 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  11. 11.Sara has a ribbon 4/7 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =
  12. 12.Anaya has a ribbon 1/3 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  13. 13.3/4 − 3/7 =
  14. 14.7/10 − 3/5 =
  15. 15.A bottle has 2/3 litre of juice. Aarav drinks 3/5 litre. How much juice is left (in litres)? =
  16. 16.1/2 − 4/9 =
  17. 17.7/8 − 1/2 =
  18. 18.1/4 − 1/5 =
  19. 19.A tank is 3/5 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  20. 20.7/8 − 2/3 =
  21. 21.A bottle has 2/3 litre of juice. Diya drinks 3/5 litre. How much juice is left (in litres)? =
  22. 22.A tank is 5/8 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  23. 23.4/5 − 3/10 =
  24. 24.Ishaan has a ribbon 9/10 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  25. 25.5/6 − 4/9 =
  26. 26.9/10 − 1/2 =
  27. 27.4/5 − 3/4 =
  28. 28.A tank is 7/8 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  29. 29.Vihaan has a ribbon 3/4 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  30. 30.2/3 − 4/7 =
  31. 31.A tank is 2/3 full of water. Then water filling 1/5 of the tank is used. What fraction of the tank is full now? =
  32. 32.1/6 − 1/8 =
  33. 33.3/7 − 1/3 =
  34. 34.5/6 − 7/9 =
  35. 35.Rohan has a ribbon 4/9 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  36. 36.4/5 − 2/3 =
  37. 37.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  38. 38.2/3 − 3/7 =
  39. 39.1/3 − 3/10 =
  40. 40.3/4 − 7/10 =

Answer key

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

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