<PRE><B>Question 1084467</B>
Mentally compute the product of 49 and 19. Describe the steps that you mentally went through to get your answer.
---------
There&#39;s more than 1 way.
The average is (49+19)/2 = 34
----
The difference from the average is 15
----
49*19 = 34^2 - 15^2 = 1156 - 225 = 931
----------
Or,
50*19 = 950
950 - 19 = 931
----------
Or 49*19 = 7*7*19 = 7*133 = 931
----------
How is my way of doing it relevant?
How would you do it?
</PRE>