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# Lesson 3.5: Roman Numerals

## Symbols

$\text{capital letter indicator}$

$\text{capital word indicator}$
⠠⠠

## Explanation

Capital and lower case Roman numerals are used in both literary and mathematical contexts. Roman numerals are brailled as regular letters using the rules for capitalization and grade 1 mode. A Roman numeral represented by a single letter standing alone will require grade 1 indicators with the exception of i, which does not have a grade 2 meaning.

The capital letter indicator, dot six is used before a single upper case Roman numeral. A sequence of Roman numerals written in upper case will require the capital word indicator, dot six, dot six.

 $i$ ⠊ $ii$ ⠊⠊ $iii$ ⠊⠊⠊ $iv$ ⠊⠧ $v$ ⠰⠧ $vi$ ⠧⠊ $vii$ ⠧⠊⠊ $viii$ ⠧⠊⠊⠊ $ix$ ⠊⠭ $x$ ⠰⠭ $I$ ⠠⠊ $II$ ⠠⠠⠊⠊ $III$ ⠠⠠⠊⠊⠊ $IV$ ⠠⠠⠊⠧ $V$ ⠰⠠⠧ $VI$ ⠠⠠⠧⠊ $VI$ ⠠⠠⠧⠊⠊ $VIII$ ⠠⠠⠧⠊⠊⠊ $IX$ ⠠⠠⠊⠭ $X$ ⠰⠠⠭

### Example 1

$\text{Complete section}\phantom{\rule{.3em}{0ex}}I\text{.}$
⠠⠉⠕⠍⠏⠇⠑⠞⠑⠀⠎⠑⠉⠰⠝⠀⠠⠊⠲

### Example 2

$\text{Read part}\phantom{\rule{.3em}{0ex}}IV\text{.}$
⠠⠗⠂⠙⠀⠐⠏⠀⠠⠠⠊⠧⠲

### Example 3

$C=100$
⠰⠠⠉⠀⠐⠶⠀⠼⠁⠚⠚

### Example 4

$iv+v=ix$
⠊⠧⠐⠖⠧⠀⠐⠶⠀⠊⠭

### Example 5

$i=1\text{,}\phantom{\rule{.3em}{0ex}}v=5\text{, and}\phantom{\rule{.3em}{0ex}}x=10\text{.}$
⠊⠀⠐⠶⠀⠼⠁⠂⠀⠰⠧⠀⠐⠶⠀⠼⠑⠂⠀⠯⠀⠰⠭⠀⠐⠶⠀⠼⠁⠚⠲

### Example 6

$LIX=50+9$
⠠⠠⠇⠊⠭⠀⠐⠶⠀⠼⠑⠚⠐⠖⠼⠊