One
is Not Prime
I
usually try to introduce the concept of 1 not being prime by examining the definitions
of prime closely.
For
a number to be prime it must have two different factors.
In
1's case its factors are 1 and 1.

For
a number to be prime it must be able to be divided by itself AND 1.
In
the case of 1 'itself ' IS one.
This
poster can then be added to your Math Vocabulary Display as a form of Math Help
reference material :)
One
is Not Prime Math Help Poster
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is Not Prime Math Help Poster
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