Question

2. Calcule o valor de N, quando:
a) N = 2 . (+7) + 5 (-2)

b) N = (-6).(-3) +2.(-6)

c) N = 3. (+8) - 7. (-7)

d) N = 2 · (+10) + 5.(-2) - 10

e) N = 3.(-1) - 5.(-1) + 4.(-1)

f) N = 10 - (-1) + (-1).(+3) - 2.(+3) + 2

g) N = -4 + (-1) - (+5)-(-3) - 4+7-(-2)

h) N = 8. (-5) - (-7). (+2) - 3 - 4
.(-1) + 6​

me ajudem, pfvrrrr​

Answer 1

Resposta:

a) N = 2 . (+7) + 5 (-2)

$14 + 5 - 2 \\ n = 17$

b) N = (-6).(-3) +2.(-6)

$18 - 12 \\ n = 6$

c) N = 3. (+8) - 7. (-7)

$24 + 49 \\ n = 73$

d) N = 2 · (+10) + 5.(-2) - 10

$20 - 10 - 10 \\ n = 0$

e) N = 3.(-1) - 5.(-1) + 4.(-1)

$- 3 + 5 - 4 \\ n = - 2$

f) N = 10 - (-1) + (-1).(+3) - 2.(+3) + 2

$10 - ( - 1) + ( - 3) - 6 + 2 \\ 10 + 1 - 3 - 6 + 2 \\ n = 4$

g) N = -4 + (-1) - (+5)-(-3) - 4+7-(-2)

$- 4 - 1 - 5 + 3 - 4 + 7 + 2 \\ - 5 - 2 + 3 + 2 \\ n = - 2$

h) N = 8. (-5) - (-7). (+2) - 3 - 4.(-1) + 6

$- 40 - ( - 14) - 3 + 4 + 6 \\ - 40 + 14 + 1 + 6 \\ n = - 19$