> The reason why we say 3 as the last digit in this case is 
> because while
> writing down the numbers, we usually start putting the ","  
> starting from
> the right most digit and ends in the left most digit (for ex 
> 123456789 will
> be represented as 12,34,56,789 or 123,456,789) and hence the 
> reason why they
> say that the last digit is the left most digit.

FWIW, I have never in my life either written or typed a number in such a sequence.

For my money, the teacher--and her source--are both OTL. It this really what we want kids to be taught?

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