Step 1
Given; Kelly bought a cup of coffee and drank 5/8 of it. Write an addition equation to represent how much coffee is remaining.
Step 2
[tex]\begin{gathered} The\text{ total fraction representing the cup=1} \\ Let\text{ the fraction left be x} \\ Thus; \\ x+\frac{5}{8}=1 \end{gathered}[/tex]The addition equation representing how much coffee is remaining is;
[tex]\begin{gathered} x=1+(-\frac{5}{8}) \\ x=\frac{3}{8} \\ Thus \\ 1+(-\frac{5}{8})=\frac{3}{8} \\ \end{gathered}[/tex]Answer;
[tex]1+(-\frac{5}{8})=\frac{3}{8}[/tex]