075. OCR A Level (H046-H446) SLR13 – 1.4 Two’s complement

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About this video

OCR Specification Reference
AS Level 1.4.1c
A Level 1.4.1c

Binary needs to be able to represent negative as well as positive numbers, in this video we take a look at one method of doing this known as Two's complement.

Key question:

- How do we represent negative numbers in binary using the two's complement method?

00:00 Two's complement
00:08 Intro
00:13 A note about this video
00:29 Analogy: Imagine a car's milometer
01:28 Representing a negative number in binary
02:14 Two's complement
04:50 Converting positive numbers into negative numbers using two's complement
07:15 Key question
07:26 Outro

Last updated: 22.06.26

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• SLR 13 – Data types