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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 562 · 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. 1.3/4 − 3/8 =
  2. 2.Tara has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  3. 3.2/3 − 1/9 =
  4. 4.1/3 − 1/4 =
  5. 5.8/9 − 1/3 =
  6. 6.Rohan has a ribbon 3/4 m long and cuts off 3/8 m. How long is the ribbon now (in m)? =
  7. 7.A bottle has 1/6 litre of juice. Sara drinks 1/9 litre. How much juice is left (in litres)? =
  8. 8.A tank is 5/6 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  9. 9.A bottle has 2/3 litre of juice. Anaya drinks 1/5 litre. How much juice is left (in litres)? =
  10. 10.5/8 − 1/4 =
  11. 11.7/9 − 2/3 =
  12. 12.A tank is 3/7 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  13. 13.8/9 − 1/6 =
  14. 14.3/4 − 2/5 =
  15. 15.1/3 − 1/8 =
  16. 16.7/9 − 1/2 =
  17. 17.5/9 − 1/6 =
  18. 18.A bottle has 3/4 litre of juice. Meera drinks 1/8 litre. How much juice is left (in litres)? =
  19. 19.1/4 − 1/7 =
  20. 20.6/7 − 2/3 =
  21. 21.2/3 − 4/9 =
  22. 22.4/5 − 1/10 =
  23. 23.A bottle has 9/10 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  24. 24.4/5 − 3/10 =
  25. 25.2/3 − 5/9 =
  26. 26.2/3 − 2/5 =
  27. 27.A tank is 5/8 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  28. 28.A tank is 6/7 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =
  29. 29.A bottle has 5/8 litre of juice. Vihaan drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.3/8 − 1/6 =
  31. 31.5/7 − 1/3 =
  32. 32.9/10 − 4/5 =
  33. 33.Meera has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  34. 34.A bottle has 5/7 litre of juice. Vihaan drinks 2/3 litre. How much juice is left (in litres)? =
  35. 35.5/6 − 1/5 =
  36. 36.1/4 − 1/10 =
  37. 37.A bottle has 1/2 litre of juice. Kabir drinks 1/9 litre. How much juice is left (in litres)? =
  38. 38.Ishaan has a ribbon 3/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  39. 39.A tank is 1/2 full of water. Then water filling 4/9 of the tank is used. What fraction of the tank is full now? =
  40. 40.A tank is 9/10 full of water. Then water filling 2/3 of the tank is used. What fraction of the tank is full now? =

Answer key

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

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