Question

8) Determine o valor da Expressão: a) (+30+20:5-4):(-6+3) b) (24-8):(1-5)×(2-3)×(5-3) c) (-8): 2×(-3-2-5)-60

Answer 1

a) (+30+20:5-4):(-6+3)=
(30+4-4):(-3)
30:(-3)= -10

b) (24-8):(1-5)×(2-3)×(5-3)=
16:(-4).(-1).2=
(-4).(-1).2=8

c) (-8): 2×(-3-2-5)-60=
(-8):2.(-10)-60=
-4.(-10)-60=
40-60=-20