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a negative + negative = negative (ex. -10+-10=-20)

a positive + negative = a positive or a negative depending on how high the negative number is (ex1. 10+-5=5 , ex2. 10+-15=-5)

a positive + positive = a positive "obviously" (ex. 2+2=4)

a negative - negative = positive (ex. -5--10=5) because the minus sign and the negative sign automatically turn into an addition sign.

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Q: What is a negative minus a ngeative?
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