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Because if a negative is multiplied by another negative it will always be positive. But, if a positive is multiplied or divided by a negative it will always be negative. If the two signs are the same and or being multiplied or divided they will be positive. If the two signs are different and or being multiplied or divided will be negative.
True, but the question is not about multiplication, but addition.
i like to think of it like this
on a number line there are positives and negatives
-3 -2 -1 0 1 2 3
if you added 2 to zero you move up to the number positive 2 then move down two number, which represents subtracting two or negative two. you should end up on zero
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What does a Minus plus a plus equal?
Negative plus a negative is a negative. Ex. -1+-1=-2 Negative times a negative is a positive. -2*-2=4 But a negative [minus] plus a positive [plus] can be minus, zero or plus: For example, -3 + 2 = -1 -3 + 3 = 0 -3 + 4 = +1
Does negative one plus one equal zero?
yes
What does negative 4 plus 4 equal?
-4 plus 4 equals zero.
A negative times or divided by a positive equals a?
A Negative times or divided by a Positive equals a Negative A Negative times or divided by a Negative gives a Positive A Positive times or divided by a Negative gives a Negative A Positive times or Divided by a Positive gives a Positive Zero is neither Positive or Negative so anything times Zero is not Positive or Negative.
Is the intersection of non negative integers and non-positive integers is zero?
Yes, the intersection of non-negative (positive) and non-positive (negative) integers is zero.
