Rules for integers
Adding and subtracting....
positive + positive = positive
negative + negative = add the two numbers and the answer will be negative
Example: -5+-5=-10 or the same problem could be written in this form -5-5=-10
If you have a positive and a negative number to find the answer you will subtract and take the sign of the largest number.
Example: -5+2=-3 or 2-5=-3
Multiplying and Dividing.....
positive x positive = positive
positive x negative = negative
negative x negative = positive
positive/positive = positive
positive/negative = negative
negative/positive = negative
negative/negative = positive