Question

qual a metade de 3 quintos (fraçao) ?

Answer 1

vejamos:
(3/5) ÷ 2=( 3/5)×(1/2)=3/10.
Verificando:
3/5 de 500litros=(3×500)/5=1500/5=300 e a metade de 300.
300/2=150.
logo:
3/10 de 500=(3×500)/10=1500/10=150.
abraços.