You would write put the equation -1.6+(-2.4) and then you can circle the -1.6 and the -2.4 and then on top of both forms you can put if it is negative and positive. If they are both negative and positive then you add both of them and then determine the sign. If both of them are not negative or positive then you would subtract and to find the sign for unlike integers you would look at the number with the greatest absolute value.
