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Twos Complement

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Twos Complement, a selection of answers from the Dr. Math archives.

Two's Complement
What is two's complement and how is it used?

Twos Complement Notation
How to make a 2-byte negative; where in the 16 bits the sign bit is place, and why.

Negative Numbers in Binary
How do I represent -53 as a binary number? Is it 110101? Wouldn't that be +53?

Subtraction Using Nine's and Ten's Complements
How does subtraction using the "method of complements" work? Why does it give the correct answer all of the time?

Subtracting and Borrowing in a Column
A student borrowed in a column as follows: 6.9 - 7.92, to get -2.98. Why won't borrowing work with this number?

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