Question

Resolva as expressões numéricas:
a) [ (32 - 4 . 3) + 24 : 6 - 7] =
b) - 10 + [ ( - 7 - 3) : ( - 2) ] - 20 =
c) ( - 15 + 4) + [ - 18 + ( - 3 - 7 + 5) ] =
d) 52 - { 12 + [ 15 - ( 8 - 4) ] } =

Answer 1

a) [ (32 - 4 . 3) + 24 : 6 - 7] =

= 27,27 + 24 : (-1)

= 51,7 : (-1)

= -51,7

b) - 10 + [ ( - 7 - 3) : ( - 2) ] - 20 =

= -10 + [ -10 : (-2) ] - 20

= -10 + 5 -20

= -25

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

= -11 + [ -18 + (-5)]

= -11 + (-23)

= -11 -23

= -34

d) 52 - { 12 + [ 15 - ( 8 - 4) ] } =

= 52 - [ 12 + 11]

= 52 - 23

= 29

Answer 2

Resposta:

a) [(32 - 4 . 3) + 24 : 6 - 7]

= [(32 - 12) + 4 - 7]

=20 + 4 - 7

=17

b) - 10 + [ ( - 7 - 3) : ( -2) ] - 20

= - 10 + [ -10 : - 2] - 20

= - 10 - 5 - 20

= -35

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

= - 11 + [ -18 - 5 ]

= - 11 - 23

= - 34

d) 52 - { 12 + [15 - ( 8 - 4) ] }

= 52 - { 12 + [15 - 4] }

= 52 - {12 + 11}

= 52 - 23

= 29