Question

calcule o valor das seguintes expreçoes

a 25-(8-5+3)-(12-6-8)=
b (10-2)-3+(8+7-5)=
c(9-4+2)-1+(9+5-3)=
d18-[2+(7-3-8)-10]=
e25-{-2+[6+(-4-1 )]}=
f 17-{5-3+[8-(-1-3)+5]}=
g -10-{-2+[+1-(-3-5)+3]}=
h {2+[1+(-15-15)-2]}=
i{30+[10-5+(-2-3)]-18-12=
j20+{[7+5+(-9+7)+3]}=
k10-{-2+[+1+(+7-3)-2]+6}=
l-{-2-[-3-(-5)+1]}-18
m -20-{-4-[-8+(+12-6-2)+2+3]}=
n 3-{-5-[8-2+(-5+9)]}=

por pfr com o calculooo

Answer 1

Resposta:

Explicação passo a passo:

Calcule o valor das seguintes expressões:

a)

25-(8-5+3)-(12-6-8)

= 25 - (3+3)- (6-8)

= 25 - 6 - (-2)

= 19 + 2

= 21

_____________

b)

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

= 8 - 3 + 10

= 5 + 10

= 15

___________

c)

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

= 5 + 2 - 1 + 11

= 7 + 10

= 17

-------------

d)

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

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

= 18 - [ 2 - 4 - 10]

= 18 - [ 2 - 14]

= 18 - [- 12]

= 18 + 12

= 30

-----------

e)

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

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

= 25 - {-2+1}

= 25 - {-1}

= 25+1

= 26

_______

f)

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

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

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

= 17- [2+17]}

= 17-19

= - 2

________

g)

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

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

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

= - 10 - {-2+12}

= - 10 - {10}

= - 20

h)

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

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

= 2+[1-30-2]}

= 2+[1-32]

= 2-31

= - 29

i)

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

= 30 + [5-5] - 30

= 0

----------

j)

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

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

= 20+{12-2+3}

= 20+{10+3}

= 33

----------

k)

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

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

= 10 - {-2+3+6}

= 10 - {1+6}

= 10 - 7

= 3

_________

l)

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

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

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

= - { - 2 - 3} - 18

= - { - 5 } - 18

= 5 - 18

= - 13

________

m)

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

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

= - 20 - {-4-[-8+9]}

= - 20 - {-4-1}

= -20-{-5}

= -20+5

= -15

___________

n)

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

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

= 3 - {-5 - 10}

= 3 - {-15}

= 3+15

= 18