Question

87 / 6 + 270/10=
9/6 x 6/2 =
2/3 : 3/4 =
5/4 : 2/7 =

Answer 1

$\frac{1245}{30}$

$\frac{9}{2}$
 
$\frac{8}9}$

$\frac{35}{8}$



Espero ter ajudado! =)

Answer 2

a) $\frac{87}{6}+ \frac{270}{10}$

$\frac{270}{10}$ pode ser escrita como 27, então a expressãp acima fica:

$\frac{87}{6} +27$ ⇒ $\frac{87+6.27}{6}$ ⇒ $\frac{249}{6}$

= $\frac{83}{2}$

b) $\frac{9}{6}$ x $\frac{6}{2}$ = $\frac{9.6}{2.6} = \frac{9}{2}$

c) $\frac{ \frac{2}{3} }{ \frac{3}{4} }$ = $\frac{2}{3}$ x $\frac{4}{3}$ = $\frac{2.4}{3.3}$ = $\frac{8}{9}$

d) $\frac{ \frac{5}{4}}{ \frac{2}{7} }$ = $\frac{5}{4}$ x $\frac{7}{2}$ = $\frac{5.7}{4.8}$ = $\frac{35}{8}$