 Positive and Negative Integer Rules,
a selection of answers from the Dr. Math archives.
 Negative Number Rules
 When do two negative numbers equal a positive?
 Manipulating Positive and Negative Numbers
 Could you explain the rules for adding, subtracting,
multiplying, and dividing positive and negative numbers?
 Signs: Rules, Number Line
 What is ()  (+) = ? or (+) + () = ?
 Subtracting Numbers by Walking a Number Line
 For example: 8.1 6.9 = 1.2 and 9.9 11.1 = 1.2.
All the numbers are negative, so why is the answer to
the first problem negative but the second isn't?
 And see:
 Negative x Negative = Positive  Dr. Math FAQ
 Why does a negative times a negative equal a positive?
Does this ever happen in the real world?
