Question

Expressao

a)-500+550-600+650
b)(4-6)+[-3+(2+1)]
c)(1-2+2-3)+(-1+2-2+3)
d)(-7-2)+(-7+2)+(+7-2)
e)(2-12+22)+[-13+(3-8)]
f)[-3+(8-5)+2]+[6+(-7+1)-5]
g)1+{-2+[3+(-4-5-6)+7]-8}

Answer 1

Olá,

Vamos lá,

a)
=-500+550-600+650
= - 1100 + 1200
= 100


b)
=(4-6)+[-3+(2+1)]
= -2 +[ -3 +3]
= -2 + 0
= -2


c)
=(1-2+2-3)+(-1+2-2+3)
= -2 + 2
= 0

d)
=(-7-2)+(-7+2)+(+7-2)
=-9 - 5 + 5
= -9

e)
=(2-12+22)+[-13+(3-8)]
= 12 +[ -13 - 5]
= 12 - 18
= - 6

f)
=[-3+(8-5)+2]+[6+(-7+1)-5]
=[-3+3 +2]+[ 6 -6-5]
= 2 - 5
= -3

g)
=1+{-2+[3+(-4-5-6)+7]-8}
=1+{ -2 +[3-15+7]-8}
=1+{-2 - 5 - 8}
=1 - 15
= -14