Differences

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--- haas:spring2014:cprog:projects:vertcross [2014/03/13 09:34] – [Multiplying two three-digit numbers together] wedge
+++ haas:spring2014:cprog:projects:vertcross [2014/03/13 09:42] (current) – [Multiplying two double digit numbers together] wedge
@@ Line 77: / Line 77: @@
         1         1
          0
++2      1         1
+        1         1
               = 611
@@ Line 92: / Line 96: @@
   * multiply crosswise the two left-most columns (thousands)
   * multiply vertically the left-most column (ten thousands)
+Note the stretching/expanding approach that is taken here-- with each successive place, the range of columns involved in that position's calculation grows (including an additional column to the left with each position), until all columns are involved, then we shrink it progressively one column at a time (removing columns from the right) as we wane down to a single column on the left.
 Let's look at 123 x 234:
@@ Line 105: / Line 111: @@
 x1               + 0  ten thousands (sum of 2 carry out of 0)
- We then take the sums from each operation and place them as appropriate in their position in the final number (ones place is furthest on the right).
+  We then take the sums from each operation and place them as appropriate
+ in their position in the final number (ones place is furthest on the right).
 x 234 = 28782

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