How do ALUs differentiate between signed and unsigned number operations?

Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter3: Data Representation
Section: Chapter Questions
Problem 3VE: A(n) __________ is an integer stored in double the normal number of bit positions.
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How do ALUs differentiate between signed and unsigned number operations?

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