Digital Electronics - Digital Arithmetic Operations and Circuits - Discussion

4. 

Solving –11 + (–2) will yield which two's-complement answer?

[A]. 1110 1101
[B]. 1111 1001
[C]. 1111 0011
[D]. 1110 1001

Answer: Option C

Explanation:

No answer description available for this question.

Manish said: (Mar 20, 2012)  
-11 written in 2's complement

-11=0101 2's complement
& similar value of -2=1110 2'scomlement
then -11+(-2)
0101+1110=1 0011
MSD 1 REPRESENT NEGATIVE SIGN

Kiran said: (Jul 31, 2017)  
-11 + (-2) = -13.
2's complement of (- 13) = 1111 0011.

Manoja V. said: (Oct 26, 2017)  
Thank you @Kiran.

Anud said: (Jul 15, 2018)  
-11---

0000 1011
1111 0100(1s complement)
+1(add one)
-------------------
1111 0101(2s complement).

-2---
0000 0010
1111 1101(1s complement)
+1(add one)
------------------
1111 1110(2s complement).

(-11)+(-2);
1111 0101
1111 1110
-------------------
1111 0011.

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