Question

1) Resolve os cálculos usando as regras de sinais: a) (- 5) + (+ 2) - (- 1) + (- 7) =
b) (+ 2) - (- 3) + (- 5) - (- 9) =
c) (- 2) + (-1) - (- 7) + (- 4) =
d) (- 5) + (- 6) - (- 2) + (- 3) =
e) (+ 9) - (- 2) + (- 1) - (- 3) =
f) (-3) . (+2) . (-4) . (+1) . (-5) =
g) (-1) . (-2) . (-3) . (-4) .(-5) =
h) (-2) . (-2) . (-2) . (-2) .(-2) . (-2) =
i) 265) : (-5) =
j) (+824) : (+4) =
k) (-180) : (-12) =
l) (-480) : (-10) =
2) Resolve as equações do 1º grau
a) 6x = 2x +16
b) 2x - 5 = x +1
c) 2x + 3 = x+4
d) 5x + 7 = 4x +10
e) 4x – 10 = 2x + 2
f) 2x + 1 = 4x + 10
g) 3x – 2 + x = 2x + 9
h) 17x – 7x = x + 18
i) 16x – 1 = 12x + 3
j) 2x + 1 = 4x – 7
k) 5x – 3 + x = 2x + 9
l) x + x – 4 = 17 - 2x
m) x + 2x + 3 - 5x = 4x – 9
n) 5x + 6x – 16 = 3x + 2z – 4
o) 5x + 4 = 3x - 2x + 4

Answer 1

Resposta:

-5+2+1-7 =-9

2+3-5+9= 9

-2-1+7-4= 0

-5-6+2-3 = -12

9+2-1+3 = -13

Explicação passo a passo:

Answer 2

A) -9

B) 9

C) 0

D) -12

E) 13

F) -120

G) -120

H) 64

I) 53

J) 206

K) 15

L) 48