Question

10) resolva es expressões abaixo: a) 10-[-2+(-9+3)-1]= b)21-[+5-(-2-3)]= c)-12+{27÷[3-(-2)×(-6)}

Answer 1

a)10-[-2+(9+3)-1]=

10-[2+12-1]

10-[14-1]=13

Answer 2

Resposta:

a)10-[-2+(-9+3)-1]=

10-[-2-6-1]=

10-[-9]=

10+9=

19

b)21-[+5-(-2-3)]=

21-[+5+5]=

21-10=

11

c)-12+{27÷[3-(-2)•(-6)]}=

-12+{27÷[3-(+12)]}=

-12+{27÷[3-12]}=

-12+{27÷(-9)}=

-12+{-3}=

-12-3=

-15