Suppose x and y are two POSITIVE numbers so that -x and -y are negative.
Then a negative minus a negative = (-x) - (-y) = -x +y
If x > y the answer is negative
If x = y the answer is zero
If x < y the answer is positive
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8 minus negative three or 8--3 equal positive 11. The double negative converts the minus sign into a plus sign and the negative into a positive.
-10 minus -10 is 0.
0 minus negative 6 is equal to 6.
-8 - (-13) = - 8 + 13 = +5 ( minus a minus is a plus)
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