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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 89 · 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. 1.1/2 − 1/10 =
  2. 2.1/2 − 3/7 =
  3. 3.1/6 − 1/8 =
  4. 4.A tank is 2/3 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  5. 5.2/5 − 1/4 =
  6. 6.1/2 − 2/5 =
  7. 7.A bottle has 1/3 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  8. 8.2/3 − 1/4 =
  9. 9.3/4 − 4/7 =
  10. 10.1/2 − 3/10 =
  11. 11.9/10 − 1/2 =
  12. 12.9/10 − 1/3 =
  13. 13.A bottle has 7/9 litre of juice. Kabir drinks 2/3 litre. How much juice is left (in litres)? =
  14. 14.A tank is 3/7 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  15. 15.A bottle has 5/6 litre of juice. Kabir drinks 1/5 litre. How much juice is left (in litres)? =
  16. 16.2/3 − 2/7 =
  17. 17.3/5 − 3/10 =
  18. 18.9/10 − 4/5 =
  19. 19.A tank is 3/4 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  20. 20.8/9 − 1/6 =
  21. 21.1/4 − 1/6 =
  22. 22.A bottle has 2/3 litre of juice. Meera drinks 1/7 litre. How much juice is left (in litres)? =
  23. 23.5/8 − 1/3 =
  24. 24.Sara has a ribbon 1/2 m long and cuts off 1/9 m. How long is the ribbon now (in m)? =
  25. 25.A bottle has 2/9 litre of juice. Aarav drinks 1/6 litre. How much juice is left (in litres)? =
  26. 26.Anaya has a ribbon 3/4 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  27. 27.2/3 − 3/10 =
  28. 28.A bottle has 5/9 litre of juice. Rohan drinks 1/2 litre. How much juice is left (in litres)? =
  29. 29.5/6 − 1/3 =
  30. 30.Sara has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  31. 31.9/10 − 2/5 =
  32. 32.A tank is 5/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  33. 33.2/3 − 3/5 =
  34. 34.1/2 − 1/7 =
  35. 35.4/5 − 3/10 =
  36. 36.5/6 − 7/9 =
  37. 37.3/4 − 5/7 =
  38. 38.7/8 − 3/4 =
  39. 39.2/3 − 4/7 =
  40. 40.5/8 − 1/2 =

Answer key

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

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