Question

Elimine os parenteses e calcule.
a) (-3)+(+11)+(-8)
b) (-12)+(-3)+(+9)
c) (-5)+(-1)+(-26)
d) (+11)+(-4)+(+2).

2) questão 2...
a)(-34)+(+12)
b) (-84)+(+84)
c) (+48)+(-66)
d) (-91)+0
e) 0+(+77).

Questão 3 calcule as expressoes

a) (-15+4)+[-18+(-3-7+5)]
b) - 1+[1+(1-1)-1]
c) - 1+(-2+5)+[-4+(-6+5-8)]

Answer 1

1.

a)-3+11-8 = 0

b)-12-3+9=-6

c)-5-1-26=-32

d)+11-4+2=9

2.

a)-34+12=-22

b)-84+84=0

c)+48-66=-18

d)-91+0=-91

e)0+77=77

3.

a)-15+4+[-18+(-3-7+5)]

-11+[-18(-5)]

-11+[-18-5]

-11-23

-34

b) -1+[1+(0)-1]

-1+[1-1]

-1+0

-1

c)-1+(3)+[-4+(-6+5-8)]

-1+3+[-4+(-9)]

2+[-4-9]

2-13

-11

obs: fiz as contas eliminando os parenteses