Question

how to add and subtract positive and negative fractions

Answer 1

Rules for adding: if the bases are the same you can add them, and subtracting happens in a fraction

Answer 2

1.  create a common denominator. 
2. multiply the numerator by the same number . Next , you multiply the top numbers (numerators)by the same number as the denominators .
3. add (or subtract ) the numerators. 
4. simplify if necessary.