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can anyone verify if am I correct?
+46 (7 bits)
S.M : 0101110
1's C. : 0101110 ( the same )
2's C. : 0101110 ( the same )
-17 (7 bits)
S.M : 1010001
1's C. : 1101110
2's C. : 1101111
The +46 ones are all incorrect (your comment is correct). To test the signed magnitude, just break down the magnitude component like:
Once you get the signed magnitude, the others should be easy.
Your -17 are all correct.