Question

valor das expressões 2/7×3/5-1/8÷5/6

Answer 1

$\dfrac{2}{7} \times \dfrac{3}{5} - \dfrac{1}{8} \div \dfrac{5}{6} =\\\\\\\\ \dfrac{6}{35} - \dfrac{1}{8} \div \dfrac{5}{6}=\\\\\\\\\dfrac{6}{35} - \dfrac{1}{8} \times\dfrac{6}{5}=\\\\\\\\ \dfrac{6}{35} - \dfrac{6}{40}$


mmc entre 35 e 40 = 280

Divide pelo de baixo e multiplica pelo de cima ..

$\dfrac{48}{280} - \dfrac{42}{280} = \dfrac{6}{280} = \boxed{ \frac{3}{140} }$



Forte abraço