Question

Resolva as expressões numéricas abaixo: a) 20 + { 13 + [10.(-2) – 6]+ 4} = b) 52 – { 12 + [ 15 – ( 8 – 4.2)]} = c) 25 + { 12 + [ 2.-4 – ( 8 – 6 ) + 2 ]} = *

4 ​

Answer 1

Resposta:

a) 30+{13 + [10.(-2) - 6]+4}=

= 30+{13 + [-20-6] +4}=

= 30+{13-26}=

= 30 - 13 =

=17

b)52 - {12+[15 - (8 - 4 . 2)]}=

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

=52 - {12+[15 - 0]}=

=52 - {12+ 15}=

= 52 - 27 =

= 25

c)25 + { 12 + [ 2.-4 – ( 8 – 6 ) + 2 ]} = 

=25 + { 12 + [ 2.(-4) – 2 + 2 ]} = 

=25 + { 12 + [ -8 – 2 + 2 ]} = 

=25 + { 12 + [ -10 + 2 ]} = 

= 25 + { 12 -8 } = 

= 25 + 4 = 

= 29