Question 15904
-ve + -ve=-ve
-ve + +ve this depends on size of figures e.g -5 + 3=-2 but -5 + 6=+1
-ve - -ve= again depends on size of figures  but - -ve is same as adding +ve number to first -ve number
-ve - +ve= -ve always
-ve x -ve= +ve always
-ve x +ve= -ve always
hope you understand

Pete