Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Education » mathedcc

Topic: Re: Teaching Dev Mathematics Conceptually: practical ideas
Replies: 96   Last Post: May 4, 2009 5:07 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Larry Stone

Posts: 25
Registered: 4/9/08
RE: Teaching Dev Mathematics Conceptually: practical ideas
Posted: Feb 8, 2009 1:17 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply


Regarding "PEMDAS":

I once had a student from Africa who would use "BODMAS", which puts brackets first, then "oxponents," then division and then multiplication. I notice that if you do all divisions before all mutliplications, it is actually equivalent to doing all multiplications and divisions in order left to right.

Example: 15 * 12 / 3 = 15 * 4 = 60; 15 * 12 / 3 = 180 / 3 = 60.

But, it is not always more convenient this way:

16 * 5 / 8 = 80/8 = 10 is more convenient than 16 * 5 / 8 = 16 * 0.625 = 10.

Just FYI!

-Larry Stone
****************************************************************************
* To post to the list: email mathedcc@mathforum.org *
* To unsubscribe, email the message "unsubscribe mathedcc" to majordomo@mathforum.org *
* Archives at http://mathforum.org/kb/forum.jspa?forumID=184 *
****************************************************************************


Date Subject Author
2/4/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
kathleen Offenholley
2/4/09
Read RE: Teaching Dev Mathematics Conceptually: practical ideas
Prof Martin Weissman
2/4/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Jonathan Groves
2/5/09
Read order of ops
Beth Hentges
2/6/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
kathleen Offenholley
2/6/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Jonathan Groves
2/7/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Phil Mahler
2/7/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Alain Schremmer
2/7/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Jonathan Groves
2/9/09
Read fraction bar
Beth Hentges
2/9/09
Read Re: fraction bar
Bret Taylor
2/9/09
Read Re: fraction bar
Jonathan Groves
2/7/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
kathleen Offenholley
2/7/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Jonathan Groves
2/7/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Phil Mahler
2/7/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Jonathan Groves
2/8/09
Read RE: Teaching Dev Mathematics Conceptually: practical ideas
Larry Stone
2/9/09
Read mult and div
Beth Hentges
2/9/09
Read RE: mult and div
Prof Martin Weissman
2/10/09
Read RE: mult and div
Phil Mahler
2/10/09
Read RE: mult and div
Bruce Yoshiwara
2/9/09
Read -2^4 vs (-2)^4
Beth Hentges
2/9/09
Read RE: -2^4 vs (-2)^4
Prof Martin Weissman
2/9/09
Read Re: -2^4 vs (-2)^4
Alain Schremmer
2/9/09
Read Re: RE: -2^4 vs (-2)^4
Jonathan Groves
2/10/09
Read RE: RE: -2^4 vs (-2)^4
Beth Hentges
2/18/09
Read Re: -2^4 vs (-2)^4
Jonathan Groves
2/9/09
Read RE: -2^4 vs (-2)^4
Prof Martin Weissman
2/9/09
Read Re: -2^4 vs (-2)^4
Alain Schremmer
2/9/09
Read Re: -2^4 vs (-2)^4
Bret Taylor
2/9/09
Read RE: -2^4 vs (-2)^4
Daniel Kleinfelter
2/9/09
Read Re: -2^4 vs (-2)^4
Alain Schremmer
2/10/09
Read RE: -2^4 vs (-2)^4
Adam Stinchcombe
2/10/09
Read Re: -2^4 vs (-2)^4
Alain Schremmer
2/10/09
Read RE: -2^4 vs (-2)^4
Beth Hentges
2/10/09
Read Re: -2^4 vs (-2)^4
Alain Schremmer
2/10/09
Read RE: -2^4 vs (-2)^4 [Microsoft Excel]
Matthews, George
2/10/09
Read RE: -2^4 vs (-2)^4 [Microsoft Excel]
Phil Mahler
2/10/09
Read Re: RE: -2^4 vs (-2)^4 [Microsoft Excel]
Jonathan Groves
2/10/09
Read Re: RE: -2^4 vs (-2)^4 [Microsoft Excel]
Sharon Killian
2/10/09
Read RE: RE: -2^4 vs (-2)^4 [Microsoft Excel]
Beth Hentges
2/10/09
Read Re: RE: RE: -2^4 vs (-2)^4 [Microsoft Excel]
Jodi Cotten
2/25/09
Read Re: RE: -2^4 vs (-2)^4 [Microsoft Excel]
Jonathan Groves
2/27/09
Read Re: RE: -2^4 vs (-2)^4 [Microsoft Excel]
Jonathan Groves
2/9/09
Read Re: RE: Teaching Dev Mathematics Conceptually: practical ideas
Jonathan Groves
2/16/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Sue VanHattum
2/18/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Jonathan Groves
2/18/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Phil Mahler
2/18/09
Read Different Orders of Operations Among Machines and Humans
Jonathan Groves
2/18/09
Read Re: Different Orders of Operations Among Machines and Humans
Wayne Mackey
2/18/09
Read Re: Different Orders of Operations Among Machines and Humans
Phil Mahler
2/18/09
Read Re: Different Orders of Operations Among Machines and Humans
Wayne Mackey
5/4/09
Read Re: Different Orders of Operations Among Machines and Humans
martsbradley
2/18/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Wayne Mackey
2/18/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Phil Mahler
2/18/09
Read RE: Teaching Dev Mathematics Conceptually: practical ideas
Mowers, Kathy \(Owensboro\)
2/18/09
Read RE: Teaching Dev Mathematics Conceptually: practical ideas
Wayne Mackey
2/18/09
Read minus vs. opposite symbols
Larry Stone
2/20/09
Read Re: minus vs. opposite symbols
Beverly R. Broomell
2/21/09
Read Re: minus vs. opposite symbols
Jonathan Groves
2/23/09
Read Re: minus vs. opposite symbols
Dana Lee Ling
2/23/09
Read RE: minus vs. opposite symbols
Bruce Yoshiwara
2/18/09
Read RE: Teaching Dev Mathematics Conceptually: practical ideas
Prof Martin Weissman
2/18/09
Read RE: Teaching Dev Mathematics Conceptually: practical ideas
Wayne Mackey
2/19/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Alain Schremmer
2/19/09
Read How Would You Help This Student?
Prof Martin Weissman
2/19/09
Read Re: How Would You Help This Student?
Alain Schremmer
2/19/09
Read Re: How Would You Help This Student?
Wayne Mackey
2/19/09
Read Re: How Would You Help This Student?
Clyde Greeno
2/19/09
Read Re: How Would You Help This Student?
Alain Schremmer
2/19/09
Read Re: How Would You Help This Student?
Greeno
2/19/09
Read Re: How Would You Help This Student?
Alain Schremmer
2/19/09
Read Re: How Would You Help This Student?
Wayne Mackey
2/19/09
Read RE: How Would You Help This Student?
Bruce Yoshiwara
2/20/09
Read Re: How Would You Help This Student?
Jonathan Groves
2/20/09
Read Re: How Would You Help This Student?
Alain Schremmer
2/20/09
Read RE: How Would You Help This Student?
Larry Stone
2/18/09
Read Re: RE: Teaching Dev Mathematics Conceptually: practical ideas
Jonathan Groves
2/19/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Alain Schremmer
2/20/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
George Alexander
2/20/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Wayne Mackey
2/20/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Alain Schremmer
2/20/09
Read counting on, counting back
Beth Hentges
2/20/09
Read Re: counting on, counting back
Alain Schremmer
2/23/09
Read Re: counting on, counting back
Alain Schremmer
2/23/09
Read Cognitively Guided Instruction
Beth Hentges
2/23/09
Read Re: Cognitively Guided Instruction
Alain Schremmer
2/23/09
Read RE: Cognitively Guided Instruction
Beth Hentges
2/24/09
Read RE: Cognitively Guided Instruction
Beth Hentges
2/20/09
Read RE: Teaching Dev Mathematics Conceptually: practical ideas
Mowers, Kathy \(Owensboro\)
2/20/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Alain Schremmer
2/20/09
Read RE: Teaching Dev Mathematics Conceptually: practical ideas
Bruce Yoshiwara
2/20/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Alain Schremmer
2/18/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Wayne Mackey
2/18/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Phil Mahler
2/20/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Jonathan Groves
2/20/09
Read Re: Teaching Dev Mathematics Conceptually: practical ideas
Alain Schremmer

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.