Question

2) Calcule as expressões:
a) 83 - 100 + 17 - 32 - 18
b) (-50) + (0) + (-67) + (+23) + (+150) c) -17 + [ 33 + ( 20 - 25 ) ]
d) (-11 + 4) + [ -17 + (-3 -7 + 1) ]

3) Calcule os produtos:
a) (+3).(+2).(-2)
b) (+4).(-6).(-1)
c) (-8).(-2).(-3)
d) (-1).(+12).(-3)
e) (-6).(-6).(+5)
f) (+10).(-10).(+10)
g) (-4).(+5).(-2).(+5)
h) (+3).(-1).(-4).(+2).(-10)
i) (-10).(+12).(-3).(0).(+12)
j) (-3).(-2).(-2).(-5)
me ajudem pff

Answer 1

$2)\\\\a) 83 - 100 + 17 - 32 - 18\\-17 + 17 -32-18\\-32-18\\= - 50$

$b)\\(-50) + (0) + (-67) + (+23) + (+150)\\-50-67+23+150\\-117+173\\=56$

$c)\\-17 + [ 33 + ( 20 - 25 ) ]\\\\-17+[33+ (-5)]\\-17+[33-5]\\-17+[28]\\-17+28\\=11$

$d) \\(-11 + 4) + [ -17 + (-3 -7 + 1) ]\\(-7)+[-17+(-10+1)]\\(-7)+[-17+(-9)]\\(-7)+[-17-9]\\(-7)+[-26]\\-7-26\\=-33$

OBS: Comece realizando os cálculos dentro de ''()'' e depois ''[]''.

a) (+3).(+2).(-2)

6(-2) = -12

b) (+4).(-6).(-1)

- 24. (-1) = 24

c) (-8).(-2).(-3)

16 (-3)  = - 48

d) (-1).(+12).(-3)

-12 . (-3) = 36

e) (-6).(-6).(+5)

36 . 5 = 180

f) (+10).(-10).(+10)

-100 . 10 = - 1000

g) (-4).(+5).(-2).(+5)

-20 . (-2) . 5 = 40 . 5 = 200

h) (+3).(-1).(-4).(+2).(-10)

-3 (-4) . 2 . (-10) = 12 . 2 . (-10) = 24 . (-10) = - 240

i) (-10).(+12).(-3).(0).(+12)

-120 .(-3).(0).(+12)  = 0

j) (-3).(-2).(-2).(-5)

6 .(-2).(-5)  = - 12.(-5)  = 60