INTEGERS- ADDING-113a

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