The Column furthest to the right is written as 1 and means 1 times 10 to the power of 0 (1).
If you go one to the left, it's written as 10 and means 1 times 10 to the power of 1 (10).
Each time you go one to the left the power increases by 1.
Binary uses a base code of 2.
This means instead of ten to the power of whatever, it is 2 to the power of whatever. This means the column to the far right is how many times 1, the next one to the left is how many 2's ...e.t.c.
Computers use binary because there are only to things you could put in each column, 1/0 or on and off.
Hex uses a base code of 16.
This means instead of ten to the power of something it is 16 to the power of something.
The reason we use it to help us understand binary is because each character/column is for each four binary columns.
When adding binary numbers, if there is a 1 and a 0 then in that column you put a 1, if there are no 1's then you put a zero, if there are 2 1's then you put a 0 and carry the 1 to the next column, if there are 3 1's then you put a 1 and carry a 1 to the next column.
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