Answer
13.80 mm
Work Step by Step
The first mark to the left of the 0 is:$\ \ \ \ 13\ \ \ \ \ \ $ mm
The mark that most nearly lines up is:$\underline{\ \ \ 0.80\ }$ mm
The total measurement is:$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 13.80\ $ mm