Question

4/5 dividido por 6/5
10/7 + 4/5
10/5 - 20/5

Answer 1

Resposta:

$a)\ \boxed{\bf{ \dfrac{2}{3}}}\\\\b)\ \boxed{\bf{ \dfrac{78}{35}}}\\\\c)\ \boxed{\bf{-2}}$

Explicação passo-a-passo:

$a)\ \dfrac{\ \dfrac{4}{5}\ }{\dfrac{6}{5}}=\dfrac{4}{5}\times \dfrac{5}{6}=\dfrac{4}{\not5}\times \dfrac{\not5}{6}=\dfrac{4}{6}=\boxed{\bf{\dfrac{2}{3}}}\\\\\\b)\ \dfrac{10}{7}+\dfrac{4}{5}= \dfrac{50+28}{35}=\boxed{\bf{\dfrac{78}{35}}}\\\\\\c)\ \dfrac{10}{5}-\dfrac{20}{5}=\dfrac{10-20}{5}=\dfrac{-10}{\ \ \ \ 5}=\boxed{\bf{-2}}\\\\\\\ ou\ \dfrac{10}{5}-\dfrac{20}{5}=2 - 4 ==\boxed{\bf{-2}}$

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