CPM Homework Banner
6-83.

Add or subtract and simplify each of the following expressions. Justify that each step of your process makes sense.

  1.  

    Because the denominators are the same, simply add the numerators.

  2.  

    To get a common denominator:

    Multiply the first fraction by 

    and the second fraction by 

    When subtracting, distribute the negative to all terms in the numerator of the second fraction.