Resposta :
a) (-2) . (+3) . (+4) = - 24
b) (+5) . (-1) . (+2) = - 10
c) (+8) . (-2) . (-3) = + 48
d) (+1) . (+1 .(+1) . (+1) = + 1
e) (+3) . (-2) . (-1) . (-5) = - 30
f) (-2) . (-4) .(+16) . (+5) = + 240
g) (+1) . (-1) . (+1) . (-1) = + 1
b) (+5) . (-1) . (+2) = - 10
c) (+8) . (-2) . (-3) = + 48
d) (+1) . (+1 .(+1) . (+1) = + 1
e) (+3) . (-2) . (-1) . (-5) = - 30
f) (-2) . (-4) .(+16) . (+5) = + 240
g) (+1) . (-1) . (+1) . (-1) = + 1