Binary Arithmetic, Subtraction

The rules for binary arithmetic are:

0 + 0 = 0, carry = 0

1 + 0 = 1, carry = 0

0 + 1 = 1, carry = 0

1 + 1 = 0, carry = 1

The rules for binary subtraction are:

0 - 0 = 0, borrow = 0

1 - 0 = 1, borrow = 0

0 - 1 = 1, borrow = 1

1 - 1 = 0, borrow = 0

Borrows, Carries from digits to left of current of digit.

Binary subtraction, addition works just the same as decimal addition, subtraction.

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