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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 72 · 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. 1.4/5 − 1/2 =
  2. 2.5/9 − 1/6 =
  3. 3.A bottle has 7/10 litre of juice. Riya drinks 1/6 litre. How much juice is left (in litres)? =
  4. 4.7/10 − 2/5 =
  5. 5.1/2 − 2/5 =
  6. 6.A bottle has 4/7 litre of juice. Vihaan drinks 1/2 litre. How much juice is left (in litres)? =
  7. 7.5/6 − 3/10 =
  8. 8.1/2 − 1/3 =
  9. 9.7/9 − 1/3 =
  10. 10.Sara has a ribbon 4/5 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  11. 11.Diya has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  12. 12.2/3 − 4/9 =
  13. 13.2/3 − 2/9 =
  14. 14.Sara has a ribbon 1/2 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  15. 15.3/7 − 1/3 =
  16. 16.8/9 − 2/3 =
  17. 17.3/4 − 3/7 =
  18. 18.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? =
  19. 19.2/5 − 1/4 =
  20. 20.A tank is 8/9 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  21. 21.9/10 − 1/4 =
  22. 22.A bottle has 5/9 litre of juice. Tara drinks 1/6 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 3/4 litre of juice. Riya drinks 3/8 litre. How much juice is left (in litres)? =
  24. 24.1/3 − 1/4 =
  25. 25.7/8 − 3/4 =
  26. 26.5/6 − 5/8 =
  27. 27.2/3 − 3/10 =
  28. 28.4/5 − 1/10 =
  29. 29.7/8 − 1/3 =
  30. 30.Kabir has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  31. 31.A bottle has 3/8 litre of juice. Kabir drinks 1/4 litre. How much juice is left (in litres)? =
  32. 32.A tank is 1/3 full of water. Then water filling 1/7 of the tank is used. What fraction of the tank is full now? =
  33. 33.1/2 − 2/9 =
  34. 34.3/8 − 1/4 =
  35. 35.1/4 − 1/7 =
  36. 36.A bottle has 7/9 litre of juice. Ishaan drinks 2/3 litre. How much juice is left (in litres)? =
  37. 37.A tank is 7/10 full of water. Then water filling 2/5 of the tank is used. What fraction of the tank is full now? =
  38. 38.3/8 − 1/6 =
  39. 39.Aarav has a ribbon 5/8 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  40. 40.5/9 − 1/2 =

Answer key

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

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