Question

sobre 7 x 3 sobre 5 - 1 sobre 8 ÷ 5 sobre 6

$\frac{2}{7} x \frac{3}{5} - \frac{1}{8} / \frac{5}{6}$

Answer 1

Olá, boa tarde.

1) 7×3=21

2) 5-1=4

3) 24×-21

140

(passo a passo da 3 na imagem).

Answer 2

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\mathsf{\left(\dfrac{2}{7} \times \dfrac{3}{5}\right) - \left(\dfrac{1}{8} \div \dfrac{5}{6}\right)}$

$\mathsf{\left(\dfrac{2}{7} \times \dfrac{3}{5}\right) - \left(\dfrac{1}{8} \times \dfrac{6}{5}\right)}$

$\mathsf{\left(\dfrac{6}{35}\right) - \left(\dfrac{6}{40}\right)}$

$\mathsf{\left(\dfrac{[6 \times 8] - [6 \times 7]}{280}\right)}$

$\mathsf{\left(\dfrac{48 - 42}{280}\right)}$

$\mathsf{\left(\dfrac{6}{280}\right)}$

$\boxed{\boxed{\mathsf{\dfrac{3}{140}}}}$