Question

1-Resolva as expressões:

a)-6+5+12-7

b) (+10)-(+8)-(-18) + (-6)

c) (-1)+(-7)= (-2)

e) (-2) + (-2) (-2)

f) (-1)-(+6) (+4) - (+3)

g)-5 (4-12:2)

d) (-6)2+(-3)

h) (-4)2+√9 (-2)​

Answer 1

Resposta:

a)-6+5+12-7

$- 6 + 5 + 12 - 7 \\ - 1 + 5 = 4$

b) (+10)-(+8)-(-18) + (-6)

$10 - 8 + 18 - 6 \\ 2 + 12 = 14$

c) (-1)+(-7)= (-2)

$- 1 - 7 = - 2 \\ - 1 - 7 + 2 \\ - 8 + 2 = - 6$

d) (-6)2+(-3)

$- 6 \times 2 - 3 \\ - 12 - 3 = - 15$

e) (-2) + (-2) (-2)

$- 2 +4 = 2$

f) (-1)-(+6) (+4) - (+3)

$- 1 - 24 - 3 \\ - 25 - 3 = - 28$

g)-5 (4-12:2)

$- 5 \times (4 - 6) \\ - 5 \times - 2 = 10$

h) (-4)2+√9 (-2)

$( - 4) \times 2 + 3 \times - 2 \\ - 8 - 6 = - 14$