Types. Medicare is a form of primary insurance coverage. When individuals 65 or older with Medicare incur medical expenses, the doctor or hospital bills Medicare first. Medicare pays all the bills up to its maximum coverage limit.
The Roman numeral system works by having separate symbols to represent different numbers but unlike your system there was no symbol for zero.he Roman numeral system works by having separate symbols to represent different numbers but unlike your system there was no symbol for zero.
This page explains how Roman numerals work. This is the convention I was taught in school. The Romans (and subsequent users) weren't nearly as strict about how to write numbers in their day, but this is the way you will see Roman numerals written in almost all cases today. In this case, a letter with a smaller value precedes one with a larger value and the value of the smaller is subtracted from the larger. 2  The result is then added to the rest of the letters. 3  The following rules apply to subtraction: 4  Only powers of ten (I, X, C, M) can be subtracted.