Resolva as expressões:

A) −6 + 5 + 12 − 7
B) (+10) − (+8) − (−18) + (−6)
C) (−1) + (−7) ∶ (−2)
D) (−6)² + (−3)
E) (−2) + (−2) ∶ (−2)
F) (−1) − (+6) ∙ (+4) − (+3)
G) −5 ∙ (4 − 12 ∶ 2)
H) (−4)² + √9 ∙ (−2)

Continua após a publicidade..

Resposta:

A) -6 + 5 + 12 – 7
= (-6 + 5) + (12 – 7)
= -1 + 5
= 4

B) (+10) – (+8) – (-18) + (-6)
= 10 – 8 + 18 – 6
= 2 + 18 – 6
= 20 – 6
= 14

C) (-1) + (-7) ÷ (-2)
= -1 – (7 / 2)
= -1 – 3.5
= -4.5

D) (-6)² + (-3)
= 36 – 3
= 33

E) (-2) + (-2) ÷ (-2)
= -2 + 1
= -1

F) (-1) – (+6) * (+4) – (+3)
= -1 – 24 – 3
= -1 – 27
= -28

G) -5 * (4 – 12 ÷ 2)
= -5 * (4 – 6)
= -5 * (-2)
= 10

H) (-4)² + √9 * (-2)
= 16 + 3 * (-2)
= 16 – 6
= 10

Continua após a publicidade..