
Art Art and Architecture Forum  Math in our world, culture, buildings, natural wonders, nature, movies, music 
 LinkBack  Thread Tools  Display Modes 
December 10th, 2010, 06:24 AM  #1 
Member Joined: Nov 2010 Posts: 34 Thanks: 0  Roman counting system
The basis of the Roman numerical system is counting on the fingers indicates that the Latin word "Jigitus" where we use word is derived from "digit" .Romans wrote numbers from one to four as follows the symbol which represent five is v may represent the gap between the thumb and the rest of the fingers In order to avoid writing number 4 ( iiii) ,they used the place value for symbol ,so if was written to the left of the symbol another symbol bigger than it means the Sum of the two numbers and is was written to the right of the symbol another symbol bigger than it means difference between the two numbers .numbers 6 , 7 , 8 are To write 10 they used symbol X , so by using the former rule 9 = IX , 11 = XI , 12= XII , 13= XIII , 14= XVI , 15 = XV , 16 = XVI , 17 = XVII , 18= XVIII , 19 = XIX , 20= XX and 30 = XXX In order to avoid writing number 40 = XXXX they used L to represent 50 so 40 = XL , 60 = LX and so on. To write 100 they used symbol C ,so 90 = XC , 120 = CXX ,150= CL and 200 = CC. To write 500 they used D ,so CD = 400 , DC = 600 and 700 = DCC . They used M to write 1000 ,so 900 = CM , 1100 = MC and 1300 = MCCC. now to write 1408 by using Roman counting system = MXDVIII To write 1564 = MDLXIV To write 2010= MMX. 
December 10th, 2010, 07:31 AM  #2  
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms  Re: Roman counting system Quote:
Quote:
    / / / / / /X where the different marks help you count when the numbers get large. Quote:
Worth noting  though you surely know  you can only subtract the next smaller tens place. VX and IC aren't allowed. Quote:
 

Tags 
counting, roman, system 
Search tags for this page 
roman counting system,roman counting,roman conting.com,romanconting,9 romanconting,www .romans xxxx.com,Romancouting,roman finger coun,roman finger counting,roman system of counting,what is roman system of counting,romancounting,roman system of counting and writing,"roman counting system",common roman counting system
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
roman numbers  manish151  Algebra  2  October 11th, 2013 03:19 PM 
More Counting  roguebyte  Advanced Statistics  4  February 3rd, 2012 07:41 PM 
counting  counting  New Users  0  October 15th, 2011 09:41 PM 
Counting help  lamhmh  Applied Math  1  July 28th, 2011 03:05 AM 
Difference between Metric System & International System?  zain  Elementary Math  1  April 7th, 2008 03:23 PM 