-37
Chat with our AI personalities
8 - (-21) = 8 + 21 = 29
It is: 8 - -21 = 29
-8 - (-13) = - 8 + 13 = +5 ( minus a minus is a plus)
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.
-3 minus -11 is 8.