Tom Ayalon

Ch 3

1) 
   10110 (-10)         11110 (-2)        11111 (-1)
   10111 (-9)          11101 (-3)        01111 (15)
   -----------         ----------       -----------
[1]01101 (+13)      [1]11011 (-5)     [1]01110 (14)
   overflow           no overflow        no overflow


2)
     0101 (5)
    -0110 (6)
    ------
     1001 (-1)

3)

Two's complement            One's complement
    1011.101                     1011.101
   +0111.011                    +0111.011
   ----------                  ----------
 [1]0011.000                  [1]0011.000
                                        1  
                               -----------
                                 0011.001