How to Read a Micrometer?

Micrometer sleeve is divided into 10 equal parts. Each part equals 1 tenth of an inch. Each of these is divided into 4 equal parts. Each of these 4 subdivisions is equal to .025 or 40th of a inch. Basically the line on the sleeve marked is ‘1’ and it represents .100′, the line marked ‘2’ represents .200′ and so forth.