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1-3   
(1) 01101110  真值=110 (2) 10001101  真值=-13  
 
1-4  
(1)+010111  
 
[+010111]原=[+010111]反=[+010111]补=00010111  
 (2) +101011  
 
[+101011]原=[+101011]反=[+101011]补=00101011  
 (3) –101000  
[-101000]原=10101000      [-101000]反=11010111 [-101000]补=11011000  
(4) -111111  
 [-111111]原=10111111  
     [-111111]反=11000000  
[-111111]补=11000001  
1-6  
(1) [x1+y1]补=[x1]补+ [y1]补=00010100+00100001=00110101 (3)[x2-y2]补=[x2]补+ [-y2]补=11101100+00100001=00001101 (4) [x2+y2]补=[x2]补+ [y2]补=11101100+11011111=11001011 1-7 (2) -85+60  
解:[-85]补=10101011 [60]补=00111100  
[-85]补+[60]补=10101011+00111100=11100111  
 
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