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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 133 · 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. 1.1/5 − 1/6 =
  2. 2.A bottle has 5/7 litre of juice. Arjun drinks 1/4 litre. How much juice is left (in litres)? =
  3. 3.A bottle has 9/10 litre of juice. Vihaan drinks 2/5 litre. How much juice is left (in litres)? =
  4. 4.5/7 − 1/3 =
  5. 5.A tank is 1/3 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  6. 6.7/9 − 1/3 =
  7. 7.A tank is 3/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  8. 8.5/6 − 7/10 =
  9. 9.A bottle has 5/6 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  10. 10.A bottle has 5/9 litre of juice. Tara drinks 1/2 litre. How much juice is left (in litres)? =
  11. 11.4/7 − 1/3 =
  12. 12.9/10 − 1/2 =
  13. 13.1/2 − 2/5 =
  14. 14.A tank is 2/3 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  15. 15.1/3 − 2/7 =
  16. 16.7/8 − 1/4 =
  17. 17.1/4 − 1/10 =
  18. 18.8/9 − 2/3 =
  19. 19.A bottle has 1/2 litre of juice. Riya drinks 1/9 litre. How much juice is left (in litres)? =
  20. 20.3/4 − 2/7 =
  21. 21.2/3 − 2/7 =
  22. 22.4/7 − 1/2 =
  23. 23.A bottle has 4/7 litre of juice. Kabir drinks 1/2 litre. How much juice is left (in litres)? =
  24. 24.3/4 − 5/8 =
  25. 25.9/10 − 2/5 =
  26. 26.A tank is 5/6 full of water. Then water filling 7/10 of the tank is used. What fraction of the tank is full now? =
  27. 27.3/4 − 1/8 =
  28. 28.Vihaan has a ribbon 2/3 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  29. 29.Diya has a ribbon 1/2 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  30. 30.1/3 − 1/8 =
  31. 31.3/4 − 3/8 =
  32. 32.6/7 − 1/3 =
  33. 33.1/4 − 1/5 =
  34. 34.1/3 − 1/10 =
  35. 35.3/5 − 1/6 =
  36. 36.3/7 − 1/4 =
  37. 37.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 1/3 litre of juice. Rohan drinks 2/7 litre. How much juice is left (in litres)? =
  39. 39.A tank is 9/10 full of water. Then water filling 3/5 of the tank is used. What fraction of the tank is full now? =
  40. 40.Sara has a ribbon 4/5 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =

Answer key

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

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