Question

obs: preciso da resposta urgente pra hj porfavor alguém me ajudaaaaaaaa​

Answer 1

Explicação passo-a-passo:

$7)\\ \\ a)~~(2)^{-3}={1\over2^3}={1\over8}\\ \\ b)~~2005^0=1\\ \\ c)~~1000^1=1000\\ \\ d)~~(-{1\over4})^2=+{1\over16}$

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$8)\\ a)\\ \\ {3\over2}+{3\over3}=\\\\ mmc(2,3)=6\\ \\ {9+6\over6}={15\over6}={5\over2}\\ \\ b)\\ 33-3,3=29,7\\ \\ c)\\ \\ 2.{5\over3}={2.3+5\over3}={11\over3}\\ \\ d)\\ 21,8\times0,32=6,976\\ \\ e)\\ 9,576\div5,32=1,8$