Question

calcule o valor das expressão

Answer 1

Resposta:

$( + \frac{2}{3} ) \times ( - \frac{1}{5} ) = - \frac{2}{3} \times \frac{1}{5} = - \frac{2}{15}$

$( + \frac{2}{3} ) \div ( - \frac{1}{5} ) = - \frac{2}{3} \times \frac{5}{1} = - \frac{10}{3}$