Question

Faça o jogo de sinais, elimine os parênteses e determine:
.
a) – (+2) + (– 5)
.
b) + (– 2) + (– 5) + ( + 7) – (+3 )
.
c) – (– 2 ) + (– 5 ) – (– 9) +( + 6)
.
d) +( + 2) – ( + 7) – (+3 ) + (+ 4 ) – ( + 7) – (+3 )

Answer 1

Resposta:

a) -7

b) -3

c) 12

d) - 14

Explicação passo-a-passo:

a)

– (+2) + (– 5)

-2 -5

-7

b)

+ (– 2) + (– 5) + ( + 7) – (+3 )

-2 -5 +7 -3

-3

c)

– (– 2 ) + (– 5 ) – (– 9) +( + 6)

2 -5 +9 +6

12

d)

+( + 2) – ( + 7) – (+3 ) + (+ 4 ) – ( + 7) – (+3 )

2 -7 -3 +4 -7 -3

-14