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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 690 · 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. 1.1/4 − 1/8 =
  2. 2.3/4 − 1/7 =
  3. 3.A bottle has 1/6 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  4. 4.7/10 − 3/5 =
  5. 5.Riya has a ribbon 2/3 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  6. 6.A bottle has 1/6 litre of juice. Kabir drinks 1/10 litre. How much juice is left (in litres)? =
  7. 7.9/10 − 2/3 =
  8. 8.A bottle has 2/3 litre of juice. Kabir drinks 2/7 litre. How much juice is left (in litres)? =
  9. 9.4/5 − 7/10 =
  10. 10.6/7 − 1/4 =
  11. 11.3/4 − 2/7 =
  12. 12.Sara has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  13. 13.Tara has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  14. 14.4/7 − 1/4 =
  15. 15.5/6 − 5/8 =
  16. 16.Riya has a ribbon 1/4 m long and cuts off 1/8 m. How long is the ribbon now (in m)? =
  17. 17.5/6 − 1/9 =
  18. 18.A bottle has 3/4 litre of juice. Riya drinks 4/7 litre. How much juice is left (in litres)? =
  19. 19.Diya has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  20. 20.3/4 − 2/5 =
  21. 21.A tank is 1/2 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  22. 22.1/2 − 1/5 =
  23. 23.A bottle has 3/4 litre of juice. Rohan drinks 7/10 litre. How much juice is left (in litres)? =
  24. 24.Vihaan has a ribbon 1/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  25. 25.1/2 − 1/7 =
  26. 26.A bottle has 9/10 litre of juice. Kabir drinks 1/3 litre. How much juice is left (in litres)? =
  27. 27.1/2 − 3/8 =
  28. 28.5/6 − 1/8 =
  29. 29.A tank is 4/7 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  30. 30.A bottle has 8/9 litre of juice. Ishaan drinks 1/2 litre. How much juice is left (in litres)? =
  31. 31.6/7 − 2/3 =
  32. 32.A tank is 5/6 full of water. Then water filling 3/8 of the tank is used. What fraction of the tank is full now? =
  33. 33.5/8 − 1/4 =
  34. 34.A bottle has 2/3 litre of juice. Diya drinks 1/7 litre. How much juice is left (in litres)? =
  35. 35.A bottle has 2/3 litre of juice. Riya drinks 3/10 litre. How much juice is left (in litres)? =
  36. 36.2/3 − 3/7 =
  37. 37.A tank is 1/3 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  38. 38.Diya has a ribbon 5/6 m long and cuts off 1/3 m. How long is the ribbon now (in m)? =
  39. 39.5/7 − 1/4 =
  40. 40.5/7 − 1/3 =

Answer key

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

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