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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 632 · 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. 1.2/3 − 3/7 =
  2. 2.A bottle has 3/7 litre of juice. Meera drinks 1/3 litre. How much juice is left (in litres)? =
  3. 3.1/3 − 2/9 =
  4. 4.1/3 − 2/7 =
  5. 5.3/8 − 1/6 =
  6. 6.3/10 − 1/5 =
  7. 7.A tank is 2/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  8. 8.3/4 − 2/5 =
  9. 9.1/2 − 1/3 =
  10. 10.2/3 − 1/7 =
  11. 11.2/3 − 5/8 =
  12. 12.7/10 − 1/4 =
  13. 13.5/8 − 1/2 =
  14. 14.3/5 − 1/10 =
  15. 15.5/8 − 1/3 =
  16. 16.Vihaan has a ribbon 1/4 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  17. 17.A bottle has 5/7 litre of juice. Arjun drinks 1/3 litre. How much juice is left (in litres)? =
  18. 18.5/7 − 2/3 =
  19. 19.9/10 − 1/5 =
  20. 20.2/3 − 5/9 =
  21. 21.Sara has a ribbon 6/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  22. 22.A tank is 3/4 full of water. Then water filling 4/7 of the tank is used. What fraction of the tank is full now? =
  23. 23.A bottle has 8/9 litre of juice. Tara drinks 2/3 litre. How much juice is left (in litres)? =
  24. 24.A tank is 2/3 full of water. Then water filling 5/8 of the tank is used. What fraction of the tank is full now? =
  25. 25.A tank is 7/8 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  26. 26.2/7 − 1/4 =
  27. 27.5/6 − 3/5 =
  28. 28.4/7 − 1/2 =
  29. 29.A bottle has 5/6 litre of juice. Rohan drinks 4/5 litre. How much juice is left (in litres)? =
  30. 30.6/7 − 3/4 =
  31. 31.3/4 − 4/7 =
  32. 32.7/10 − 3/5 =
  33. 33.A bottle has 9/10 litre of juice. Diya drinks 1/2 litre. How much juice is left (in litres)? =
  34. 34.A bottle has 1/3 litre of juice. Tara drinks 1/9 litre. How much juice is left (in litres)? =
  35. 35.A tank is 1/2 full of water. Then water filling 1/9 of the tank is used. What fraction of the tank is full now? =
  36. 36.1/2 − 1/4 =
  37. 37.A bottle has 5/6 litre of juice. Ishaan drinks 5/9 litre. How much juice is left (in litres)? =
  38. 38.4/9 − 1/6 =
  39. 39.7/10 − 2/3 =
  40. 40.Sara has a ribbon 7/8 m long and cuts off 1/2 m. How long is the ribbon now (in m)? =

Answer key

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

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