Multiplying and Dividing with Negative Numbers

The multiply/divide sign rule:


Here's another way of saying this....


Examples:
Multiply Divide
SAME ==> -5 x -5 = +25 -8/-4 = +2 <== SAME
DIFFERENT ==> -5 x +5 = -25 -8/+4 = -2 <== DIFFERENT
SAME ==> +5 x +5 = +25 +8/+4 = +2 <== SAME
DIFFERENT ==> +5 x -5 = -25 +8/-4 = -2 <== DIFFERENT


Sometimes you have to subtract a negative number or add one, like this:
+8 - -4 or +8 + -4


Here, you have 2 signs together.

If you have 2 signs together, then you can replace the 2 signs with 1 sign using the multiply/divide rule.
Examples: