Binary: Plusses & Minuses (Why We Use Two’s Complement) – Computerphile

Negative Binary Numbers – you may have heard of ‘signed’ numbers, but do you know how they work? Professor Brailsford explains not just how, but why we use the systems we do.

Binary Addition:
Most Difficult Program to Compute?:
Floating Point Numbers:

This video was filmed and edited by Sean Riley.

Computer Science at the University of Nottingham:

Computerphile is a sister project to Brady Haran’s Numberphile. More at

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