INTEGERS- subtracting-114a

Rule 1. a minus number   -    a minus number equals a minus.
            -1 - -3 = -2
     2. a plus number    -     a minus number equals a plus
            +1 - -3 = -4
     3. a minus number    -   a plus number will be subtracted and the
        sign will be the sign of the larger number.
             -1 - +3 = +2
     4. a plus number   -    a minus number will be subtracted and the
        sign will be the sign of the larger number.
             +1 - -3 = -2
 Examples:    
             -120  -  -134  = - 254
             -120  -  +134  = - 254
             +120  -  -134  = -  14
             +120  -  +134  = -  14
END