Question

Calcule as multiplicação abaixo:

a)(+3).(-7)=
b)(-4).(-3).(+5)=
c)(+1).(-1).(+1).(-1)=
d)(-5).(-2).(-2)=​

Answer 1

Resposta:

a)(+3).(-7)=

$3 \times ( - 7) \\ - 21$

b)(-4).(-3).(+5)=

$12 \times 5 \\ = 60$

c)(+1).(-1).(+1).(-1)=

$- 1 \times ( - 1) \\ = 1$

d)(-5).(-2).(-2)=

$10 \times ( - 2) \\ = - 20$