66 times 5 is 330, but what is the answer if both 66 and 5 are negative numbers? Here we will determine if the answer to negative 66 times negative 5 is positive 330 or negative 330.
There are many different ways to explain and determine if the answer to negative 66 times negative 5 is -330 or +330 using mathematical terms such as additive inverse and mathematical laws like the Distribute Law.
We will take a different approach - process of elimination: We will simply test if -330 is the correct answer using basic algebra.
We will test if -330 is correct by setting up the equation negative 66 times negative 5 equals negative 330, and then simplifying the equation to see if it is true.
(-66) (-5) = (-330)
Divide both sides of the equation by (-5) :
|
| = |
|
The numerator and denominator on the left side both have (-5) which even each other out and can be removed:
| (-66) = |
|
The numerator and denominator on the right side both have a minus sign (-) which even each other out and can be removed:
| (-66) = |
|
A numerator of 330 and denominator of 5 on the right side is the same as 330 divided by 5 which is 66. Now we end up with this untrue equation:
(-66) = (66)
-66 is NOT equal to 66, thus we have proven that negative 66 times negative 5 is not equal to -330. The answer must therefore be 330:
-66 x -5 = 330
The above applies to all math problems where you multiply two negative numbers. Multiplying two negative numbers such as negative 66 times negative 5 will always have a positive answer.
Negative Times Negative Calculator
Here you can multiply another two negative numbers together.
What is negative 66 times negative 6?
Here is the next problem on our list that we have explained and calculated.
Copyright | Privacy Policy | Disclaimer | Contact