Question

A ) ( + 3 ) + ( - 5 ) + ( + 8 ) + ( +5 )
B ) ( + 4 ) + ( - 3 ) + ( + 2 )
C ) ( + 20 ) + ( + 3 ) + ( - 5 ) + ( + 9 ) + ( - 2 )
D ) ( - 8 ) + ( + 10 ) + ( -7 ) + ( - 2 )

Answer 1

Boa noite

A ) ( + 3 ) + ( - 5 ) + ( + 8 ) + ( +5 ) = 3 + 8 = 11
B ) ( + 4 ) + ( - 3 ) + ( + 2 ) = 6 - 3 = 3 
C ) ( + 20 ) + ( + 3 ) + ( - 5 ) + ( + 9 ) + ( - 2 ) = 32 - 7 = 25 
D ) ( - 8 ) + ( + 10 ) + ( -7 ) + ( - 2 ) = 10 - 17 = -7 

Answer 2

Olá!!!

Resolução!!!

a)
= ( + 3 ) + ( - 5 ) + ( + 8 ) + ( + 5 )
= + 3 - 5 + 8 + 5
= - 2 + 13
= + 11

b)
= ( + 4 ) + ( - 3 ) + ( + 2 )
= + 4 - 3 + 2
= + 1 + 2
= + 3

c)
= ( + 20 ) + ( + 3 ) + ( - 5 ) + ( + 9 ) + ( - 2 )
= + 20 + 3 - 5 + 9 - 2
= + 23 + 4 - 2
= + 27 - 2
= + 25

d)
= ( - 8 ) + ( + 10 ) + ( - 7 ) + ( - 2 )
= - 8 + 10 - 7 - 2
= + 2 - 9
= - 7

Espero ter ajudado!!!