You don't divide by a sign. You might divide by -1, which just changes the overall sign (because you multply by -1 to get back again. Dividing or multiplying with a positive sign, means divide or multiply by plus 1: leave any existing sign as it is .

You simply add the numbers.

If the sign is positive with both numbers, the sum will be positive.

1 + 3 = 4

If the sign is negative with both numbers, the sum will be negative.

-1 + -3 = -4

All of the numbers that are in Positive and Negative sign are Integers , whether they reach 1 million if it has Positive or Negative sign it is considered as Integer .

The ones with the + sign are positive. The ones with the - sign are negative.

Multiply by -1