67 times 27 is 1809, but what is the answer if both 67 and 27 are negative numbers? Here we will determine if the answer to negative 67 times negative 27 is positive 1809 or negative 1809.
There are many different ways to explain and determine if the answer to negative 67 times negative 27 is -1809 or +1809 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 -1809 is the correct answer using basic algebra.
We will test if -1809 is correct by setting up the equation negative 67 times negative 27 equals negative 1809, and then simplifying the equation to see if it is true.
(-67) (-27) = (-1809)
Divide both sides of the equation by (-27) :
|
| = |
|
The numerator and denominator on the left side both have (-27) which even each other out and can be removed:
| (-67) = |
|
The numerator and denominator on the right side both have a minus sign (-) which even each other out and can be removed:
| (-67) = |
|
A numerator of 1809 and denominator of 27 on the right side is the same as 1809 divided by 27 which is 67. Now we end up with this untrue equation:
(-67) = (67)
-67 is NOT equal to 67, thus we have proven that negative 67 times negative 27 is not equal to -1809. The answer must therefore be 1809:
-67 x -27 = 1809
The above applies to all math problems where you multiply two negative numbers. Multiplying two negative numbers such as negative 67 times negative 27 will always have a positive answer.
Negative Times Negative Calculator
Here you can multiply another two negative numbers together.
What is negative 67 times negative 28?
Here is the next problem on our list that we have explained and calculated.
Copyright | Privacy Policy | Disclaimer | Contact