1) Resolva as seguintes expressões numéricas:
a) -2-(5+8-3)+(2-5)
b) -4-(-6+6-2)+(-4+4)
c) -4-[(-4:2)]:[(-6:3)]
d) -3-[(-5-8•2)]+[(-4-8)]
e) -6[(-1-2-6)]:[(-20-11)]
f) -4-8-12=
g) -20-40+60=
h) +10•4-8+12:6=
a) -2-(5+8-3)+(2-5)
b) -4-(-6+6-2)+(-4+4)
c) -4-[(-4:2)]:[(-6:3)]
d) -3-[(-5-8•2)]+[(-4-8)]
e) -6[(-1-2-6)]:[(-20-11)]
f) -4-8-12=
g) -20-40+60=
h) +10•4-8+12:6=
Lista de comentários
Respost
a) -2-(5+8-3)+(2-5)
-2-10+3
-2-7=-9
b) -4-(-6+6-2)+(-4+4)
-4-(-2)+0
-4+2=-2
c) -4-[(-4:2)]:[(-6:3)]
-4-[-2]:[-2]
-4-[+1]
-4-1=-5
d) -3-[(-5-8•2)]+[(-4-8)]
-3-[(-5-16)]+[-12]
-3-[-21]-12
-3-[-33]
-3+33=30
e) -6[(-1-2-6)]:[(-20-11)]
-6[-9]:[-31]
-6+3,4=-9,4
f) -4-8-12=
-4-20=-24
g) -20-40+60=
-20+20=0
h) +10•4-8+12:6=
+10.4-8+2
+40-6=34