Question

VALE 65 PONTOS
calcule o valor das expressões:
a)(-3).(-8)+(-2).(-6)=
b)(-2).(-7)+√ 9- 6=
c)40:$(-1)^{5}$+$(-2)^{3}$- 12=
d) (+4) . (-5) - (+2).(-7)=
e)$2^{3}$-[(-16): (+2)-$(-1)^{9}$=

COLOQUEM CONTAS POR FAVOR

Answer 1

a)$(-3).(-8)+(-2).(-6)=\\24+12=\\36$

b)$(-2).(-7)+\sqrt{9}- 6=\\14+3-6=\\11$

c)$\dfrac{40}{(-1)^5}+(-2)^3-12=\\\\-40+(-8)-12=\\-52-8=\\-60$

d)$4\cdot(-5)-(2)\cdot(-7)=\\-20-(-14)=\\-20+14=\\-6$

e)$2^3-[\dfrac{(-16)}{2}-(-1)^9]=\\8-[-8-(-1)]=\\8-[-8+1]=\\8-[-7]=\\8+7=15$

Answer 2

a)(-3)(-8) + (-2)(-6) = 
24 + 12 = 36

b)(-2)(-7) + √9 - 6 =
14 + 3 - 6 =
17 - 6 = 11

c) 40:$(-1)^{5}$ + $(-2)^{3}$ -12=
40: -1 - 8 -12=
- 40 - 20 = - 60

d) (4) .(-5) - (2). (-7) = 
-20 + 14 = - 6

e) 2 ³ - [(-16) : (2) - $(-1)^{9}$ ] =
8 - [ - 8 +1 ]=
8 - [-7] = 
8 + 7 = 15

Bons estudos..(;