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Adding Fractions with Different Denominators Worksheet

Fractions lesson 15: Adding fractions: different denominators · Set 99 · 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. 1.7/8 + 1/6 =
  2. 2.A recipe needs 1/4 kg of flour and 9/10 kg of sugar. How much is that in all (in kg)? =
  3. 3.1/8 + 1/2 =
  4. 4.3/4 + 2/7 =
  5. 5.1/2 + 2/9 =
  6. 6.Diya walks 1/4 km to the park and then 7/8 km to the shop. How far does Diya walk in all (in km)? =
  7. 7.Tara walks 2/7 km to the park and then 2/3 km to the shop. How far does Tara walk in all (in km)? =
  8. 8.3/4 + 5/8 =
  9. 9.1/5 + 7/10 =
  10. 10.A recipe needs 3/4 kg of flour and 2/7 kg of sugar. How much is that in all (in kg)? =
  11. 11.A recipe needs 6/7 kg of flour and 2/3 kg of sugar. How much is that in all (in kg)? =
  12. 12.3/5 + 7/10 =
  13. 13.1/9 + 1/3 =
  14. 14.1/10 + 1/3 =
  15. 15.3/7 + 1/4 =
  16. 16.Tara walks 7/8 km to the park and then 1/2 km to the shop. How far does Tara walk in all (in km)? =
  17. 17.3/7 + 3/4 =
  18. 18.Anaya walks 2/3 km to the park and then 3/10 km to the shop. How far does Anaya walk in all (in km)? =
  19. 19.A recipe needs 2/3 kg of flour and 9/10 kg of sugar. How much is that in all (in kg)? =
  20. 20.5/8 + 1/3 =
  21. 21.Meera walks 9/10 km to the park and then 1/3 km to the shop. How far does Meera walk in all (in km)? =
  22. 22.Vihaan walks 2/5 km to the park and then 3/10 km to the shop. How far does Vihaan walk in all (in km)? =
  23. 23.2/9 + 5/6 =
  24. 24.A recipe needs 3/10 kg of flour and 1/2 kg of sugar. How much is that in all (in kg)? =
  25. 25.2/3 + 7/10 =
  26. 26.A recipe needs 1/8 kg of flour and 2/3 kg of sugar. How much is that in all (in kg)? =
  27. 27.5/6 + 1/2 =
  28. 28.5/7 + 3/4 =
  29. 29.Sara walks 2/7 km to the park and then 1/2 km to the shop. How far does Sara walk in all (in km)? =
  30. 30.9/10 + 4/5 =
  31. 31.4/5 + 1/2 =
  32. 32.3/7 + 1/2 =
  33. 33.2/5 + 1/3 =
  34. 34.3/5 + 9/10 =
  35. 35.A recipe needs 7/9 kg of flour and 1/2 kg of sugar. How much is that in all (in kg)? =
  36. 36.6/7 + 2/3 =
  37. 37.A jug has 4/9 litre of milk. Meera pours in 1/6 litre more. How much milk is in the jug now (in litres)? =
  38. 38.Meera walks 1/5 km to the park and then 1/3 km to the shop. How far does Meera walk in all (in km)? =
  39. 39.1/8 + 3/4 =
  40. 40.1/6 + 3/5 =

Answer key

  1. 25/24
  2. 23/20
  3. 5/8
  4. 29/28
  5. 13/18
  6. 9/8
  7. 20/21
  8. 11/8
  9. 9/10
  10. 29/28
  11. 32/21
  12. 13/10
  13. 4/9
  14. 13/30
  15. 19/28
  16. 11/8
  17. 33/28
  18. 29/30
  19. 47/30
  20. 23/24
  21. 37/30
  22. 7/10
  23. 19/18
  24. 4/5
  25. 41/30
  26. 19/24
  27. 4/3
  28. 41/28
  29. 11/14
  30. 17/10
  31. 13/10
  32. 13/14
  33. 11/15
  34. 3/2
  35. 23/18
  36. 32/21
  37. 11/18
  38. 8/15
  39. 7/8
  40. 23/30

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