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A negative plus a negative equals a negative because the operation you're doing is equivalent to subtraction.
If you wrote down a sum "negative 3 plus negative 7" it would look like this:
-3+-7
which is the same as
-3-7
Whenever you add a negative number you are actually taking more away, and this is why a negative plus a negative equals a negative - You start with a negative number, and are taking even more away, so you will only ever end up with a negative number.
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Continue Learning about Math & Arithmetic
Does a negative plus a negative equal a postive?
No, a negative plus a negative is a negative
What is positive 1 plus negative 10 equal?
1 plus negative 10 is equal to -9.
What does a negative number plus a negative number equal?
A negative plus a negative still gives a negative answer.
What does negative four plus negative two equal?
negative six
What does a negative decimal plus a negative decimal equal?
A negative decimal plus a negative decimal equals a more negative decimal
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