Respostas

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2014-08-26T15:44:24-03:00

A) 2. (-1) +2 = (-2)+2 = 0

B) 2.0+2 = 2

C)2.(-1/2) + 2= -2/2 +2 = -1+2 = 1

D) 2. (1/3)+ 2= 2/3 + 2 = 8/3

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