Question

por favor é urgente!!!

1- efetue as expressões abaixo
a) -20-{-4-[-8+(+12-6-2)+2+3]}

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

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

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

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

f) -4-{2+[-3-(-1+7)]+2}​

Answer 1

Resposta:

A= -20{-4-[-8+(+12+8)+5]}=

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

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

-20-{-4-[-8+25]}=

-20-{-4-[+34]}=

-20-{-4-34}=

-20-{-38}=

-20+38=

+18

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

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

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

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

10-{-2+3+6}=

10-{-2+6}=

10-{+4}=

10-4=

6

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

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

{2+[1-32]}=

{2+[-31]}=

{2-31}=

29

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

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

20+{[12+1]}=

20+{[+13]}=

20+{+13}=

20+13=

33

e=18-[2+(7-11)-10]

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

18-[2-4-10]

18-[2-14]

18-[-16]

18+16

34

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

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

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

-4-{2-9+2}

-4-{2-7}

-4-{-5}

-4+5

+1