Question

menos a letra d que eu já fiz​

Answer 1

Resposta:

Vamos lá!

Explicação passo-a-passo:

• Simplifique as frações, sempre que possível.

Então temos:

$\sqrt{0,444} +0,333-0,4=\\\\\sqrt{\dfrac{4}{9} } +\dfrac{3}{9} -\dfrac{4}{10} =\\\\\\\dfrac{2}{3} +\dfrac{1}{3} -\dfrac{2}{5} =\ mmc=15\\\\\\\dfrac{10+5-6}{15} =\boxed{\dfrac{9}{15} =\boxed{\dfrac{3}{5} }\\}$

$(-1,666-0,0666)\centerdot (\dfrac{15}{8} :0,25)=\\\\\\(-\dfrac{16-1}{9} -\dfrac{6}{90}) \centerdot(\dfrac{15}{8\centerdot0,25}) =\ Simplificando...\\\\\\(-\dfrac{5}{3} -\dfrac{1}{15} )\centerdot(\dfrac{15}{2}) =\ mmc=45\\\\\\-\dfrac{75-3}{45} \centerdot\dfrac{15}{2} =\\\\\\-\dfrac{78}{45} \centerdot(\dfrac{15}{2}) =\\\\\\-\dfrac{26}{15} \centerdot(\dfrac{15}{2}) =\boxed{-\frac{390}{30} =\boxed{-13}}$

$\sqrt[3]{-8} \centerdot \sqrt{7^2 +15} -(\sqrt[5]{-32} +\sqrt[4]{81}= \\\\\ -2\centerdot \sqrt{49 +15} -(-2 +3)} =\\\\-2\centerdot \sqrt{64} -1} =\\\\-2\centerdot8-1=\boxed{-16-1=\boxed{-17}\\}$

$Bons\ estudos!!!\\Prof\ Alexandre$