Resposta:
05. Resposta (D)
06. Resposta (B)
07. Resposta (C)
08. Resposta (D)
Explicação passo a passo:
05. [tex]\frac{2}{3} + \left[\frac{3}{5}\left(\frac{2}{3}-\frac{1}{2}\right)\right] = \frac{2}{3} + \left[\frac{3}{5}\left(\frac{1}{6}\right)\right] = \frac{2}{3} + \left[\frac{1}{10}\right] = \frac{20 + 3 }{30} = \frac{23}{30}[/tex]
06. [tex]3,5+2,4\cdot 6,5 = 3,5 + 15,6 = 19,10[/tex]
07. [tex]\left(-\frac{1}{2}\right)^{3}+\frac{2}{3}\cdot 5 = \left(-\frac{1}{8}\right) + \frac{10}{3} = \frac{-3 + 80}{24} = \frac{77}{24}[/tex]
08. [tex]\left(2-\frac{1}{2}\right)^{2} : \left(2+\frac{1}{2}\right)^{2} = \left(\frac{3}{2}\right)^{2} : \left(\frac{5}{2}\right)^{2} = \frac{9}{4} : \frac{25}{4} = \frac{9}{25}[/tex]
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Lista de comentários
Resposta:
05. Resposta (D)
06. Resposta (B)
07. Resposta (C)
08. Resposta (D)
Explicação passo a passo:
05. [tex]\frac{2}{3} + \left[\frac{3}{5}\left(\frac{2}{3}-\frac{1}{2}\right)\right] = \frac{2}{3} + \left[\frac{3}{5}\left(\frac{1}{6}\right)\right] = \frac{2}{3} + \left[\frac{1}{10}\right] = \frac{20 + 3 }{30} = \frac{23}{30}[/tex]
06. [tex]3,5+2,4\cdot 6,5 = 3,5 + 15,6 = 19,10[/tex]
07. [tex]\left(-\frac{1}{2}\right)^{3}+\frac{2}{3}\cdot 5 = \left(-\frac{1}{8}\right) + \frac{10}{3} = \frac{-3 + 80}{24} = \frac{77}{24}[/tex]
08. [tex]\left(2-\frac{1}{2}\right)^{2} : \left(2+\frac{1}{2}\right)^{2} = \left(\frac{3}{2}\right)^{2} : \left(\frac{5}{2}\right)^{2} = \frac{9}{4} : \frac{25}{4} = \frac{9}{25}[/tex]