Good Questions for Number Sense

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

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