Question

Efetue as multiplicações
a) (+1/5).(+4/3)=

b) (+4/9).(-7/5) =

c)(-3/2).(-5/7)=

d)(-1/5).(+1/4)=

Ajudem pfv

Answer 1

Olá

Multiplicação de frações

Multiplique cada numerador com seu respectivo e denominador com seu respectivo

$a)\left(\dfrac{1}{5}\right)\cdot\left(\dfrac{4}{3}\right)$

$\dfrac{4}{15}$


$b)\left(\dfrac{4}{9}\right)\cdot\left(\dfrac{-7}{5}\right)$

$\dfrac{-28}{45}$


$c)\left(\dfrac{-3}{2}\right)\cdot\left(\dfrac{-5}{7}\right)$

$\dfrac{15}{14}$


$d)\left(\dfrac{-1}{5}\right)\cdot\left(\dfrac{1}{4}\right)$

$\dfrac{-1}{20}$


Resposta:
$\boxed{S =\left(\dfrac{4}{15},~\dfrac{-28}{45},~\dfrac{15}{14},~\dfrac{-1}{20}\right)}~~\checkmark$