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Celeste International School

Grade 4 Β· Worksheet

Adding & subtracting fractions

Related denominators

Name: ______________________________Date: ______________Score: ______ / 20
  1. 1.

    What is 2/3 + 1/6?

    1. A5/6
    2. B3/9
    3. C3/6
    4. D5/9
  2. 2.

    What is 1/2 + 1/4?

    1. A3/4
    2. B2/6
    3. C3/6
    4. D1/8
  3. 3.

    What is 3/4 βˆ’ 1/8?

    1. A5/8
    2. B2/4
    3. C5/12
    4. D4/8
  4. 4.

    What is 1/2 βˆ’ 1/6?

    1. A2/6
    2. B1/4
    3. C2/8
    4. D1/3
  5. 5.

    What is 1/2 + 3/8?

    1. A7/8
    2. B4/10
    3. C4/8
    4. D7/10
  6. 6.

    To work out 2/3 + 1/6, first rewrite 2/3 as ?/6. What is the numerator?

  7. 7.

    What is a common denominator you could use for 1/2 and 1/4?

    1. A4
    2. B2
    3. C6
    4. D8
  8. 8.

    To work out 3/4 βˆ’ 1/8, first rewrite 3/4 as ?/8. What is the numerator?

  9. 9.

    1/2 is the same as 3/6.

    True False
  10. 10.

    1/2 + 1/4 = 2/6.

    True False
  11. 11.

    To add 1/2 + 3/6, first rewrite 1/2 as ?/6. What is the numerator?

  12. 12.

    To add 1/2 + 1/4, first rewrite 1/2 as ?/4. What is the numerator?

  13. 13.

    To add 2/4 + 4/12, first rewrite 2/4 as ?/12. What is the numerator?

  14. 14.

    To add 2/3 + 3/9, first rewrite 2/3 as ?/9. What is the numerator?

  15. 15.

    To add 1/3 + 2/9, first rewrite 1/3 as ?/9. What is the numerator?

  16. 16.

    2/3 βˆ’ 5/9 = n/9. What is n? (First write 2/3 as 6/9.)

  17. 17.

    3/4 βˆ’ 1/8 = n/8. What is n? (First write 3/4 as 6/8.)

  18. 18.

    3/5 βˆ’ 4/10 = n/10. What is n? (First write 3/5 as 6/10.)

  19. 19.

    To add 1/3 + 6/9, first rewrite 1/3 as ?/9. What is the numerator?

  20. 20.

    To add 1/2 + 1/10, first rewrite 1/2 as ?/10. What is the numerator?

Celeste International School

Answer key

Adding & subtracting fractions β€” Related denominators

  1. 1.A. 5/6
  2. 2.A. 3/4
  3. 3.A. 5/8
  4. 4.A. 2/6
  5. 5.A. 7/8
  6. 6.4
  7. 7.A. 4
  8. 8.6
  9. 9.True
  10. 10.False
  11. 11.3
  12. 12.2
  13. 13.6
  14. 14.6
  15. 15.3
  16. 16.1
  17. 17.5
  18. 18.2
  19. 19.3
  20. 20.5