Review of Introductory Mathematics
Apply rule 3.
Apply rule 1.
Apply rule 2.
The important information from this chapter is summarized below.
Signed Numbers Summary
When using signed numbers:
Adding a negative number is the same as subtracting a positive number.
Subtracting a negative number is the same as adding a positive number.
A product is negative if there is an odd number of negatives.
A product is positive if there is an even number of negatives.
Division of two numbers with like signs results in a positive answer.
Division of two numbers with unlike signs results in a negative answer.