GeoCitesSites.com

## Counting binary numbers

The number system most commonly used that everyone knows is called base 10. Base 10 goes from 0-9. The binary number system uses base 2 and only uses 1s and 0s.

01
10
11
100
101
110
111
1000
1001
1010
Do you see it?

## Converting base 2 to base 10

We have 1000101101
Chart:
256 | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1|
----|-----|----|----|----|---|---|---|--|
-1--|--0--|--1-|-1--|-0--|-1-|-0-|-0-|0-|
ok now what you may say. Now we cancel out the numbers that are 0. Just as in a computer 0 = off and 1 = on. So:
256 + 64 + 32 + 8 = 360

Ok we have 10110 and 01011 and we want to add them together. We would use a carry or anotherwords I think a parity bit.

111 10110
01011
----- 100001 *done!*

## Converting Base 10 to base2

The idea behind converting base 10 to base two is to make the graph then subtract the number thats lower than the base two number. You keep doing so untill you hit zero then the rest are zero.
we have the number 155:

now we want to make the graph

256 | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1|
----|-----|----|----|----|---|---|---|--|
-0--|--0--|--1-|-1--|-1--|-1-|-1-|-1-|1-|