Question

Calcule as expressões
A) (−3)×2+(−1)×4+8
B) 3×2+(-2)×2+5
C) (8-5)×2+(1-2)×2+3×2

Answer 1

a)

(−3)×2+(−1)×4+8

-6-4+8

=-2

b)

3×2+(2)×2+5

6+4+4

=15

c)

(8-5)×2+(1-2)×2+3×2

3×2-1×2+3×2

2(3×2-1)

2(6-1)

2×5

=10