Question

qual é o resultado das contas:
a) 31-(-9)x(-2)
b) (-4)x(-7)-12
c) (-7)x(+5)+50
d) -18+(-6)x(+7)
e) 15+(-7)x(-4)
f) (+3)x(-5)+35
g) 20-(+6-1+7)
h) 8-(+4-1)
i) -5-(-2)+3-1

Answer 1

a)31-(-9)×(-2)=
31-(+18)=
31-18=
13


b)(-4)×(-7)-12=
+27-12=
15


c)(-7)×(+5)+50=
-35+50=
15


d)-18+(-6)×(+7)=
-18+(-42)=
-18-42=
-60


e) 15+(-6)×(+7)=
15+(-42)=
15-42=
-27

f)(+3)×(-5)+35=
-15+35=
20


g)20-(+6-1+7)=
20-12=
8

h)8-(+4-1)=
8-3=
5

i)-5-(-2)+3-1=
-5-2+3-1=
-7+3-1=
-4-1=
-5