Question

ATIVIDADE 3 - Resolva as multiplicações, utilizando a técnica do cancelamento para simplifica
sempre que for possível.
a)
$\frac{1}{4} \times \frac{3}{7}$
$\frac{8}{9} \times \frac{3}{8}$
$\frac{2)}{9} \times \frac{11}{2}$
$\frac{45}{4} \times \frac{8}{9}$
​

Answer 1

Resposta:

Vamos lá!

$\dfrac{1}{4} .\dfrac{3}{7} =\dfrac{3}{28}\\\\\\\\\dfrac{8}{9} .\dfrac{3}{8} =\dfrac{24^{4} }{72^{4} }=\dfrac{6}{18}=\dfrac{1}{3}\\\\\\\\\dfrac{2}{9} .\dfrac{11}{2} =\dfrac{22}{18}=\dfrac{11}{9}\\\\\\\\\dfrac{45}{4} .\dfrac{8}{9} =45:9\cdot8:4=5\cdot2=10$