Good Questions for Number Sense

Ed2Ed - Educator to Educator Exchange

Invert-and-Multiply Rule

Level:	6th grade (or first time I&M is taught)
Goal:	Motivate and explain what seems to many to be a magic trick.
When:	Before teaching/using I&M rule

Format:	Mathcast
Author:	Robert Fant
Comments:	Watch the whole mathcast - many good questions!

Please contribute your thoughts, suggestions and - of course - your good guestions! LFS

Ed2Ed-Math247 (Links to all Ed2Ed links on this site.)