Question

calcule o valor das expressões (3/4+1/2):(1 1/2-3/4) cujo a resposta é 5/3

Answer 1

(3/4 + 1/2):(1 1/2-3/4)=

Resolvendo por partes:

$\frac{3}{4}+ \frac{1}{2}=$ --->mmc(4,2)= 4

$\frac{3+2}{4}= \frac{5}{4}$

$1 \frac{1}{2}- \frac{3}{4}= \frac{3}{2}- \frac{3}{4}$-->mmc(2,4)=4

$\frac{6-3}{4}= \frac{3}{4}$

Ficou assim:
$\frac{5}{4}: \frac{3}{4}= \frac{5}{4}* \frac{4}{3}= \frac{5}{3}$