Question 150389
<pre><font size = 4 color = "indigo"><b>
Rule:

Make this list of digit names (read downward)

   H    
   U      
   N          
   D         
   R  T
   E  E 
   D  N
   |  |
   T  T  T
M  H  H  H  H
I  O  O  O  U
L  U  U  U  N
L  S  S  S  D 
I  A  A  A  R  T  O
O  N  N  N  E  E  N
N  D  D  D  D  N  E
S  S  S  S  S  S  S  
|  |  |  |  |  |  |



582
tens

Write your number at the bottom so that the last 
digit lines up in the ONES column:

   H    
   U      
   N          
   D         
   R  T
   E  E 
   D  N
   |  |
   T  T  T
M  H  H  H  H
I  O  O  O  U
L  U  U  U  N
L  S  S  S  D 
I  A  A  A  R  T  O
O  N  N  N  E  E  N
N  D  D  D  D  N  E
S  S  S  S  S  S  S  
|  |  |  |  |  |  |
            5  8  2   to tens

Line through all the digits to the right of the
tens digit which is the 8:

            5  8 <s> 2 </s>

Look at the first digit lined through.
If it is 5 or more, then add one to the last
digit not lined through.  If it is less than
5, then skip this step.

The first digit lined through is a 2, which
is less than 5, so we skip this step

            5  8 <s> 2 </s>
 
Now replace all the lined through digits by
zeros:

            5  8  0

So the answer is 580.

------------

497,949
hundred thousands

Write your number at the bottom so that the last 
digit lines up in the ONES column:

   H    
   U      
   N          
   D         
   R  T
   E  E 
   D  N
   |  |
   T  T  T
M  H  H  H  H
I  O  O  O  U
L  U  U  U  N
L  S  S  S  D 
I  A  A  A  R  T  O
O  N  N  N  E  E  N
N  D  D  D  D  N  E
S  S  S  S  S  S  S  
|  |  |  |  |  |  |
   4  9  7  9  4  9   to hundred thousands

Line through all the digits to the right of the
hundred thousand digit which is the first 4:

   4  <s>9  7  9  4  9</s>

Look at the first digit lined through.
If it is 5 or more, then add one to the last
digit not lined through.  If it is less than
5, then skip this step.

The first digit lined through is a 9, which
is 5 or more, so we add one to the first 4,
making it 5:

   5  <s>9  7  9  4  9</s>
 
Now replace all the lined through digits by
zeros:

   5  0  0  0  0  0

So the answer is 500,000

------------------------------

6,097,597
ten thousands 

   H    
   U      
   N          
   D         
   R  T
   E  E 
   D  N
   |  |
   T  T  T
M  H  H  H  H
I  O  O  O  U
L  U  U  U  N
L  S  S  S  D 
I  A  A  A  R  T  O
O  N  N  N  E  E  N
N  D  D  D  D  N  E
S  S  S  S  S  S  S  
|  |  |  |  |  |  |
6  0  9  7  5  9  7   to ten thousands

Line through all the digits to the right of the
ten thousand digit which is the first 9:

6  0  9  <s>7  5  9  7</s>

Look at the first digit lined through.
If it is 5 or more, then add one to the last
digit not lined through.  If it is less than
5, then skip this step.

The first digit lined through is a 7, which
is 5 or more, so we add one to the first 9,
making it 10. However, since 10 is a two
digit number, we carry 1 to the digit before,
which is 0, making it 1, and replace the 9 by
zero:

6  1  0  <s>7  5  9  7</s>
 
Now replace all the lined through digits by
zeros:

6  1  0  0  0  0 0

So the answer is 6,100,000

---------------------------

155,680
hundred thousands

Write your number at the bottom so that the last 
digit lines up in the ONES column:

   H    
   U      
   N          
   D         
   R  T
   E  E 
   D  N
   |  |
   T  T  T
M  H  H  H  H
I  O  O  O  U
L  U  U  U  N
L  S  S  S  D 
I  A  A  A  R  T  O
O  N  N  N  E  E  N
N  D  D  D  D  N  E
S  S  S  S  S  S  S  
|  |  |  |  |  |  |
   1  5  5  6  8  0   to hundred thousands

Line through all the digits to the right of the
hundred thousand digit which is the 1:

   1  <s>5  5  6  8  0</s>

Look at the first digit lined through.
If it is 5 or more, then add one to the last
digit not lined through.  If it is less than
5, then skip this step.

The first digit lined through is a 5 which
is 5 or more, so we add one to the last digit
not lined through, making it 2

   2  <s>5  5  6  8  0</s>
 
Now replace all the lined through digits by
zeros:

   2  0  0  0  0  0

So the answer is 200,000

------------------------------

Edwin</pre>