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​

Answer 1

Resposta:

Explicação passo-a-passo:

2) a) N = 2.(7) + 5.(-2)  

N = 14 - 10

N = 4.

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

N = 18 - 12

N = 6.

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

N = 24 + 49

N =  73.

d) N = 2.(+10) + 5.(-2) - 10

N = 20 - 10 - 10

N = 0.

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

N = - 3 + 5 - 4

N = - 2.

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

N = 10 + 1 - 3 - 6 + 2

N = 4.

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

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

N = - 8.

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

N = - 40 + 14 - 3 + 4 + 6​

N = - 19.