Homeschool World Forums     Home     Mall     Catalog     Articles     Contests     Events     Groups     Forum     Contact  
Homeschool World Forum Forum Index Homeschool World Forum
Read thousands of forum posts on topics such as homeschool law, getting started, curriculum, special needs, homeschool vs public school, and much, much more!
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Roman Numerals Question

 
Post new topic   Reply to topic    Homeschool World Forum Forum Index -> Math
View previous topic :: View next topic  
Author Message
4given
User


Joined: 22 Mar 2007
Posts: 735
Location: S.Indiana

PostPosted: Tue May 15, 2007 5:52 am    Post subject: Roman Numerals Question Reply with quote

Recently on a test, my 3rd grade ds was asked to express the Arabic numeral 746 in Roman numerals. My son broke it down and came up with DCCVLI but the answer key says DCCXLVI. Is there more than one way to express some numerals or are we missing some sort of rule?

Thanks,
Sheila
Back to top
View user's profile Send private message
Theodore
Moderator


Joined: 06 Oct 2005
Posts: 2122
Location: Missouri, US

PostPosted: Tue May 15, 2007 1:13 pm    Post subject: Reply with quote

The applicable guideline here is one that states that a Roman numeral representing 10^n can not precede a symbol representing more than 10^n+1. For instance, V can not precede C, since C is more than 10x V. However, since L is 10x V, both versions should work, and even the rule I just gave is often considered optional.

Short version: V in front of L is ok, just not V in front of C. Both versions are correct.
_________________
Homeschool Articles - Events - Support Groups
Back to top
View user's profile Send private message Visit poster's website
4given
User


Joined: 22 Mar 2007
Posts: 735
Location: S.Indiana

PostPosted: Tue May 15, 2007 1:20 pm    Post subject: Reply with quote

Thanks, Theodore. That clears it up and my ds will be glad to know his way was acceptable.

Sheila
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Homeschool World Forum Forum Index -> Math All times are GMT - 6 Hours (CST)
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group

Homeschool World Terms of Use  •  Privacy Policy  •  Copyright ©1993-Now Home Life, Inc.