43 times 16 is 688, but what is the answer if both 43 and 16 are negative numbers? Here we will determine if the answer to negative 43 times negative 16 is positive 688 or negative 688.
There are many different ways to explain and determine if the answer to negative 43 times negative 16 is -688 or +688 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 -688 is the correct answer using basic algebra.
We will test if -688 is correct by setting up the equation negative 43 times negative 16 equals negative 688, and then simplifying the equation to see if it is true.
(-43) (-16) = (-688)
Divide both sides of the equation by (-16) :
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| = |
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The numerator and denominator on the left side both have (-16) which even each other out and can be removed:
| (-43) = |
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The numerator and denominator on the right side both have a minus sign (-) which even each other out and can be removed:
| (-43) = |
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A numerator of 688 and denominator of 16 on the right side is the same as 688 divided by 16 which is 43. Now we end up with this untrue equation:
(-43) = (43)
-43 is NOT equal to 43, thus we have proven that negative 43 times negative 16 is not equal to -688. The answer must therefore be 688:
-43 x -16 = 688
The above applies to all math problems where you multiply two negative numbers. Multiplying two negative numbers such as negative 43 times negative 16 will always have a positive answer.
Negative Times Negative Calculator
Here you can multiply another two negative numbers together.
What is negative 43 times negative 17?
Here is the next problem on our list that we have explained and calculated.
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