12 1/3 + (-3 1/4) + 4 1/2
37/3 + - 13/4 + 9/2
148/12 + - 39/12 + 54/12
163/12 = 13 7/12
1. change the numbers to mixed fraction ( denominator multiplied by base plus numerator )
2. find a common denominator
3. add and or subtract
4. simplify your answer
