Question

Determine o valor das expressões numéricas: a) (1/3-1/2):(-5/36)-(1/3-1).(-9/10) b) (-2/3).(3/4)+(-1/3)

Answer 1

a) (2-3/6):(-5/36)-(1-3/3).(-9/10)=
(-1/6):(-5/36)-(-2/3).(-9/10)=
(-1/6).(-36/5)-3/5=
6/5-3/5=3/5

b) (-2/3).(3/4)+(-1/3)=
-1/2-1/3=-3-2/6=-5/6