What is the 2s complement of 0x3D9E?

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SUMMARY

The 2's complement of the hexadecimal number 0x3D9E is calculated by first determining its 1's complement and then adding one. The correct process involves subtracting 0x3D9E from 0xFFFF, resulting in 0xC261, followed by adding one, yielding 0xC262. Therefore, the correct answer is option c) C262. This method is essential for converting positive binary numbers to their negative counterparts in binary arithmetic.

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Homework Statement



Which is 2s complement of 0x3D9E

a) BD9F
b) BDA0
c) C262
d) 3D9E

Homework Equations



I believe I subract each digit from F

The Attempt at a Solution



FFFF
-3D9E
______
C261

Someone in my class said the answer was c) but do I still add one? I remember the saying "reverse the bits and and one" does that still apply?

Tjvelcro
 
Physics news on Phys.org
You are computing 16's complement, not twos complement. And yes, you add 1 at the end to get the answer.
 

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