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Adding Fractions with Different Denominators Worksheet

Fractions lesson 15: Adding fractions: different denominators · Set 35 · 40 questions
TalentJR

The method (LCM first): Find the LCM of the two bottom numbers. Change each fraction to that bottom number (multiply its top and bottom by the same number). Add the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.Kabir walks 1/9 km to the park and then 1/3 km to the shop. How far does Kabir walk in all (in km)? =
  2. 2.3/8 + 1/3 =
  3. 3.A recipe needs 1/10 kg of flour and 3/4 kg of sugar. How much is that in all (in kg)? =
  4. 4.3/7 + 1/2 =
  5. 5.1/4 + 6/7 =
  6. 6.1/10 + 2/3 =
  7. 7.3/8 + 1/4 =
  8. 8.A recipe needs 5/7 kg of flour and 3/4 kg of sugar. How much is that in all (in kg)? =
  9. 9.1/8 + 3/4 =
  10. 10.1/2 + 2/3 =
  11. 11.A recipe needs 1/9 kg of flour and 1/3 kg of sugar. How much is that in all (in kg)? =
  12. 12.A recipe needs 2/7 kg of flour and 1/2 kg of sugar. How much is that in all (in kg)? =
  13. 13.7/8 + 1/2 =
  14. 14.Kabir walks 3/4 km to the park and then 2/3 km to the shop. How far does Kabir walk in all (in km)? =
  15. 15.4/5 + 9/10 =
  16. 16.5/9 + 5/6 =
  17. 17.1/7 + 1/4 =
  18. 18.A jug has 1/10 litre of milk. Meera pours in 1/2 litre more. How much milk is in the jug now (in litres)? =
  19. 19.3/7 + 2/3 =
  20. 20.1/3 + 1/5 =
  21. 21.1/7 + 1/3 =
  22. 22.3/7 + 1/4 =
  23. 23.3/4 + 5/6 =
  24. 24.1/5 + 7/10 =
  25. 25.1/8 + 1/3 =
  26. 26.8/9 + 1/2 =
  27. 27.4/7 + 3/4 =
  28. 28.Ishaan walks 2/5 km to the park and then 1/4 km to the shop. How far does Ishaan walk in all (in km)? =
  29. 29.A jug has 2/5 litre of milk. Arjun pours in 1/6 litre more. How much milk is in the jug now (in litres)? =
  30. 30.5/6 + 1/10 =
  31. 31.Rohan walks 2/3 km to the park and then 7/9 km to the shop. How far does Rohan walk in all (in km)? =
  32. 32.A recipe needs 1/7 kg of flour and 3/4 kg of sugar. How much is that in all (in kg)? =
  33. 33.1/3 + 1/6 =
  34. 34.A recipe needs 1/8 kg of flour and 1/2 kg of sugar. How much is that in all (in kg)? =
  35. 35.1/5 + 2/3 =
  36. 36.A jug has 5/8 litre of milk. Meera pours in 1/3 litre more. How much milk is in the jug now (in litres)? =
  37. 37.Vihaan walks 3/4 km to the park and then 5/8 km to the shop. How far does Vihaan walk in all (in km)? =
  38. 38.A jug has 5/8 litre of milk. Tara pours in 1/4 litre more. How much milk is in the jug now (in litres)? =
  39. 39.Arjun walks 5/6 km to the park and then 3/4 km to the shop. How far does Arjun walk in all (in km)? =
  40. 40.5/6 + 7/8 =

Answer key

  1. 4/9
  2. 17/24
  3. 17/20
  4. 13/14
  5. 31/28
  6. 23/30
  7. 5/8
  8. 41/28
  9. 7/8
  10. 7/6
  11. 4/9
  12. 11/14
  13. 11/8
  14. 17/12
  15. 17/10
  16. 25/18
  17. 11/28
  18. 3/5
  19. 23/21
  20. 8/15
  21. 10/21
  22. 19/28
  23. 19/12
  24. 9/10
  25. 11/24
  26. 25/18
  27. 37/28
  28. 13/20
  29. 17/30
  30. 14/15
  31. 13/9
  32. 25/28
  33. 1/2
  34. 5/8
  35. 13/15
  36. 23/24
  37. 11/8
  38. 7/8
  39. 19/12
  40. 41/24

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