0
Anonymous
-4 plus 85x81 is equal to 6,881.
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For plus we addFor minus we subetractEX:4+4=8:4-4=0
mean = (4 + 81)/2 = 85/2 = 42.5
Zero
The answer is 0.
-5 + (-4) - 12 - 20 - (-10) + 6 = -25