We were taught that the product always adds up to 9
18 1+8=9
27 2+7=9
36 3+6=9
etc.
Even 9X12=108

--- [EMAIL PROTECTED] wrote:
> Here is a little thing I learned in High school when
> it came to remembering 
> the multiplication tables by 9.
> 
>        18
>        27
>        36
>        45
>        54
>        63
>        72
>        81
> 
> Look at numbers going down the column, you have
> 1,2,3,4,5,6,7,8 as you look 
> from top to bottom.  Now look at the numbers again
> looking from bottom to 
> top, they are the same numbers in the next column,
> just in reverse order. 
> 
> Iron Mike
> _______
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