Question

1) Calcule o valor das seguintes expressões :
a) 15 -(3-2) + ( 7 -4) =
b) 25 - ( 8 - 5 + 3) - ( 12 - 5 - 8) =
c) ( 10 -2 ) - 3 + ( 8 + 7 - 5) =
d) ( 9 - 4 + 2 ) - 1 + ( 9 + 5 - 3) =
e) 18 - [ 2 + ( 7 - 3 - 8 ) - 10 ] =
f) -4 + [ -3 + ( -5 + 9 - 2 )] = -
g) -6 - [10 + (-8 -3 ) -1] =
h) -8 - [ -2 - (-12) + 3 ] =
i) 25 - { -2 + [ 6 + ( -4 -1 )]} =
k) 17 - { 5 - 3 + [ 8 - ( -1 - 3 ) + 5 ] } =
l) 3 - { -5 -[8 - 2 + ( -5 + 9 ) ] } =
m) -10 - { -2 + [ + 1 - ( - 3 - 5 ) + 3 ] } =
n) { 2 + [ 1 + ( -15 -15 ) - 2] } =
o) { 30 + [ 10 - 5 + ( -2 -3)] -18 -12} =
p) 20 + { [ 7 + 5 + ( -9 + 7 ) + 3 ] } =
q) -4 - { 2 + [ - 3 - ( -1 + 7) ] + 2} =
r) 10 - { -2 + [ +1 + ( +7 - 3) - 2] + 6 } =
s) -{ -2 - [ -3 - (-5) + 1 ]} - 18 =
t) -20 - { -4 -[-8 + ( +12 - 6 - 2 ) + 2 +3 ]} =
u) {[( -50 -10) + 11 + 19 ] + 20 } + 10 =

Answer 1

a)15-(3-2) + (7-4)=

15-1+3=

14+3= 17

b) 25 - ( 8 - 5 + 3) - ( 12 - 5 - 8) =

25- (3+3) - (7-8)=

25- 6 - (-1)=

25- 6+1=

19-1= 20

c) ( 10 -2 ) - 3 + ( 8 + 7 - 5) =

8- 3 + (15 - 5)=

5 + 10= 15

d) ( 9 - 4 + 2 ) - 1 + ( 9 + 5 - 3) =

(5+2) -1 + (14 - 3)=

7 -1 +11=

6+11= 17

e) 18 - [ 2 + ( 7 - 3 - 8 ) - 10 ] =

18- [ 2 + (4-8) -10 ]=

18- [ 2 + (-4) -10 ]=

18- [ 2 -4 -10 ]=

18- [ -2 -10 ]=

18- [ -12 ]=

18 + 12= 30

f) -4 + [ -3 + ( -5 + 9 - 2 )] =

-4 + [ -3 + (4-2) ]=

-4 + [ -3 + 2 ]=

-4 + [ -1 ]=

-4 -1= -5

g) -6 - [10 + (-8 -3 ) -1] =

-6 -[ 10 + (-11) -1 ]=

-6 -[ 10 -11 -1 ]=

-6 -[ -1 -1 ]=

-6 -[ -2 ]=

-6 + 2= -4

h) -8 - [ -2 - (-12) + 3 ] =

-8 -[ -2 + 12 + 3 ]=

-8 -[ 10 + 3 ]=

-8 -[ +13 ]=

-8 -13= -21

i) 25 - { -2 + [ 6 + ( -4 -1 )]} =

25 -{ -2 + [ 6 + (-4 -1) ] }=

25 -{ -2 + [ 6 + (-5) ] }=

25 -{ -2 + [ 6 -5 ] }=

25 -{ -2 + [ +1 ] }=

25 -{ -2 + 1 }=

25- { -1}=

25 + 1= 26

j) (vc pulou o j ;w;)

k) 17 - { 5 - 3 + [ 8 - ( -1 - 3 ) + 5 ] } =

17 -{ 2 + [ 8 -(-4) + 5 ] }=

17 -{ 2 + [ 8 + 4 + 5 ] }=

17 -{ 2 + [ 12 + 5 ] }=

17 -{ 2 + [ +17 ] }=

17 -{ 2 + 17 }=

17 -{ +19 }=

17 -19= 36

l) 3 - { -5 -[8 - 2 + ( -5 + 9 ) ] } =

3 -{ -5 - [ 6 + (-5 + 9) ] }=

3 -{ -5 - [ 6 + ( +4 ) ] }=

3 -{ -5 - [ 6 + 4 ] }=

3 -{ -5 - [ + 10 ] }=

3 -{ -5 - 10 }=

3 -{ -15 }=

3 + 15= 18

m) -10 - { -2 + [ + 1 - ( - 3 - 5 ) + 3 ] } =

-10 -{ -2 + [ + 1 -( -8 ) + 3 ] }=

-10 -{ -2 + [ + 1 + 8 + 3 ] }=

-10 -{ -2 + [ + 9 + 3 ] }=

-10 -{ -2 + [ + 12 ] }=

-10 -{ -2 + 12 }=

-10 -{ +10}=

-10 -10= -20

n) { 2 + [ 1 + ( -15 -15 ) - 2] } =

{ 2 + [ 1 + ( -30 ) -2 ] }=

{ 2 + [ 1 -30 -2 ] }=

{ 2 + [ -31 -2 ] }=

{ 2 + [ -33 ] }=

2 -33= -31

o) { 30 + [ 10 - 5 + ( -2 -3)] -18 -12} =

{ 30 + [ 5 + ( -5) ] -30 }=

{ 30 + [ 5 -5 ] -30 }=

{ 30 + [ 0 ] -30 }=

30 -30= 0

p) 20 + { [ 7 + 5 + ( -9 + 7 ) + 3 ] } =

20 + { [ 12 + ( -2 ) + 3 ] }=

20 + [ 12 -2 + 3 ]=

20 + [ 10 + 3 ]=

20 + [ + 13 ]=

20 + 13= 33

q) -4 - { 2 + [ - 3 - ( -1 + 7) ] + 2} =

-4 -{ 2 + [ -3 - ( + 6 ) ] + 2 }=

-4 -{ 2 + [ -3 -6 ] + 2 }=

-4 -{ 2 + [ -9 ] + 2 }=

-4 -{ 2 -9 + 2 }=

-4 -{ -7 + 2 }=

-4 -{ -5 }=

-4 +5= 1

r) 10 - { -2 + [ +1 + ( +7 - 3) - 2] + 6 } =

10 -{ -2 + [ + 1 + ( + 4 ) -2 ] + 6 }=

10 -{ -2 + [ + 1 + 4 -2 ] + 6 }=

10 -{ -2 + [ + 5 -2 ] + 6 }=

10 -{ -2 + [ + 3 ] + 6 }=

10 -{ -2 + 6 + 6 }=

10 -{ 4 + 6 }=

10 -{ + 10 }=

10 -10= 0

s) -{ -2 - [ -3 - (-5) + 1 ]} - 18 =

-{ -2 - [ -3 + 5 + 1 ] } -18=

-{ -2 - [ +2 +1 ] } -18=

-{ -2 - [ +3 ] } -18=

-{ -2 -3 } -18=

-{ -5 } -18=

+5 -18= -13

t) -20 - { -4 -[-8 + ( +12 - 6 - 2 ) + 2 +3 ]}=

-20 - { -4 - [ -8 + ( + 6 -2 ) + 5 ] }=

-20 - { -4 - [ -8 + ( + 4 ) + 5 ] }=

-20 - { -4 - [ -8 + 4 + 5 ] }=

-20 - { -4 - [ -4 + 5 ] }=

-20 - { -4 - [ +1 ] }=

-20 - { -4 -1 }=

-20 - { -5 }=

-20 + 5= -15

u) {[( -50 -10) + 11 + 19 ] + 20 } + 10 =

{ [ -60  + 30 ] + 20} + 10=

{ -30 + 20 } + 10=

-10 + 10= 0

~ espero ter ajudado... hehe

bjuh (~°3°)~