Question

Calcule o produto
A) (+1/5).(+4/3)
B) (+4/9).(-7/5)
C)(-3/2).(-5/7)
D)(-1/5).(+1/4)

Answer 1

A) (+1/5).(+4/3) = 4/15
B) (+4/9).(-7/5) = (-28/45)
C)(-3/2).(-5/7) = 15/14
D)(-1/5).(+1/4) = (-1/20)