multiplying 105 and 15: what happens to the regrouped digit

LANE

New member
Joined
Sep 19, 2006
Messages
4
Code:
   105
  X 15
  _____

   525      5 X 105
+1,050     10 X 105
_______
 1,575
What happens to the regrouped digit when there is a zero in the factor?
 
I don't understand what you are asking. What digit was regrouped? Aren't you just adding the intermediate results?
 
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