Operations with Negatives
Adding and Subtracting with Negatives
The first thing to know is that and its additive inverse, , add up to zero. So:
Number Line Method
Start at . When you add a positive number, or subtract a negative number, move to the right .
When you add a negative number, or subtract a positive number, move to the left .
Multiplying and Dividing with Negatives
Multiplying with Negatives
The product of two numbers with the same sign is positive. The product of two numbers with different signs is negative.
Example:
Dividing with Negatives
The quotient of two numbers with the same sign is positive. The quotient of two numbers with different signs is negative.
Example:
See also: Adding and Subtracting with Negatives and Multiplying and Dividing with Negatives