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

Then, using a different color marker write one of the column headings in small
numbers along the bottom. Then flip them and do the same on the other side.
They should look like this on one side:
0 0 0 0 0 0 0 0
128 64 32 16 8 4 2 1
And like this on the other side:
1 1 1 1 1 1 1 1
128 64 32 16 8 4 2 1
Now, instead of adding column headings you can just flip the index cards as
needed. Let’s work through one with the index flip cards. Let’s convert 234 from
decimal to binary. Start with your cards like this:
0 0 0 0 0 0 0 0
128 64 32 16 8 4 2 1
Then just subtract the column headings (in this case the little numbers on the
bottom of the card)…234-128=106. Since it is a positive number flip the card and
move on to the next one.
1 0 0 0 0 0 0 0
128 64 32 16 8 4 2 1
106 - 64 = 42. Since it is a positive number flip the card and move on to the next
one.
1 1 0 0 0 0 0 0
128 64 32 16 8 4 2 1
54