Learning by Doing: CISCO Certified Network ... - SCN Research

Let’s try another one: 223. Starting out with our 128 column heading: 223 - 128 = 95.
So we put a “1” under the 128 heading and move to the next column heading.
2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0
128 64 32 16 8 4 2 1
1
Our next one: 95 - 64 = 31. So we put a “1” under the 64 heading and move to the next
column heading.
2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0
128 64 32 16 8 4 2 1
1 1
Our next one: 31 - 32 = -1. Since this is negative we put a zero in the column heading for
32 and move on to the next one.
2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0
128 64 32 16 8 4 2 1
1 1 0
Our next one: 31 - 16 = 15. So we put a “1” under the 16 heading and move to the next
column heading.
2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0
128 64 32 16 8 4 2 1
1 1 0 1
Our next one: 15 - 8 = 7. So we put a “1” under the 8 heading and move to the next
column heading.
2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0
128 64 32 16 8 4 2 1
1 1 0 1 1
Our next one: 7 - 4 = 3. So we put a “1” under the 4 heading and move to the next
column heading.
2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0
128 64 32 16 8 4 2 1
1 1 0 1 1 1
52