A to Z Teacher Stuff ~ Teacher Resources, Lesson Plans, Themes, Tips, Printables, and more
advertise
Go Back   A to Z Teacher Stuff Forums > TeacherChat Forums > Elementary Education



Reply
 
Thread Tools
  #1  
Old 09-22-2007, 11:42 PM
giraffe326's Avatar
giraffe326 giraffe326 is offline
Virtuoso
 
Join Date: Jan 2006
Posts: 6,981
MICHIGAN
6th Grade Math/SS
Compatible numbers? Help!

I have been forewarned by my fellow 5th grade teachers that the kids have a very hard time with compatible numbers. Are there any tricks to get them to understand this?? I will be teaching them on Monday, so any tips are appreciated!

Reply With Quote

 
  #2  
Old 09-23-2007, 09:31 AM
sciencegirl's Avatar
sciencegirl sciencegirl is offline
Novice
 
Join Date: Aug 2007
Posts: 72
New York
K-3 Science
I taught 5th grade 2 years ago, and found that this wasn't too hard for them. However, last year my 4th graders struggled and struggled with it. I think it comes down to whether or not your kids know their multiplication facts by heart.

You'll definitely want to be sure you have a multiplication chart hanging up where all kids can see it during the lesson, and I recommend having laminated copies that kids can have at their seats as well, especially during independent practice. I also gave my kids one copy to keep in their homework folders. (The laminated set lived on a common shelf in my room and never went home with the kids.)

That said, I recommend using different colors and underlining parts of the problem. For example, if you're doing 460 divided by 8, you want to underline in a bright color the numbers 4 and 6 so the number 46 jumps out at them. Then have them use their charts to look along the 8's row in their multiplication chart to find a number as close to 46 as possible. They'll find 48, and you can show them that that is the compatible number. Then remind them they'll need one zero at the end since the original number was 460, not 46.

Make sense? I think the gist of what I'm saying is be sure to teach them how to use the multiplication chart effectively, and most of all, encourage them to learn these facts by memory because it will make everything so much easier!!
Reply With Quote
  #3  
Old 09-23-2007, 03:32 PM
Upsadaisy's Avatar
Upsadaisy Upsadaisy is offline
Moderator
 
Join Date: Aug 2002
Posts: 15,695
Florida
For division, I explain compatible numbers as ways to round so that you have a problem so easy that you can probably do it in your head. For addition, I've heard of teachers in younger grades introducing them as 'friends' numbers.
Reply With Quote
Reply

Tags
compatible, numbers

Thread Tools

Forum Jump

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off




Mr. Rebates

All times are GMT -6. The time now is 12:22 PM.


Copyright © 1997-2010 A to Z Teacher Stuff, L.L.C.  All Rights Reserved.
Use of this site signifies your agreement to the terms of use.
Questions, comments, and suggestions: Contact Us
Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.