Question

7.0 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​

Answer 1

Resposta:

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

N=+14+(-10)

N=+14-10

N=+4

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

N=+18+(-12)

N=+18-12

N=-6

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

N=+24-(-49)

N=+24+49

N=+73

d) N=2·(+10)+5.(-2)-10

N=+20+(-10)-10

N=+20-10-10

N=+20-20

N=0

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

N=-3-(-5)+(-4)

N=-3+5-4

N=5-7

N=-2

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

N=10+1+(-3)-(+6)+2

N=10+1-3-6+2

N=11-9+2

N=+2+2

N=+4

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

N=-4-1-(-15)-4+(-14)

N=-5+15-4-14

N=+10-18

N=-8

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

N=-40-(-14)-3-(-4)+6

N=-40+14-3+4+6

N=-26-3+10

M=-29+10

N=-19