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Topic: What are the "basic" facts?
Replies: 20   Last Post: Jul 6, 1995 8:34 PM

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Eileen Abrahamson

Posts: 85
Registered: 12/6/04
Re: What are the "basic" facts?
Posted: Jul 6, 1995 7:47 PM
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Norm wrote;
>What, IMHO, are some of the "basic" facts of multiplication?
> Multiplication is commutative.
> Multiplication is associative.
> 1 is the multiplicative identity.
> 0 is the multiplicative "annihilator."
> Multiplying x by -1 yields -x.
> Given x > 0:
> if n > 1, then n * x > x
> if 0 < n < 1, then n * x < x (an example where multiplication "makes
>things smaller")
> Additionally, students should be able to represent multiplication through
>various models (area, arrays, etc.)

I would like to add that a "basic fact" of multiplication is when to use it
and why.

When I asked the question what "basic facts" and who decided they were
basic, I was referring to exactly what Norm has discussed.


Eileen Abrahamson
Edw. Neill Elemetary
13409 Upton Ave. So.
Burnsville, MN 55337

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