Question

(+11).(+3)
(-4).(-6)
(+9).(-7)
(-16).(-6)
(-20).(+15)​

Answer 1

→ Cálculo :

Regra de sinal :      

( - ) ( - ) = +  

( + ) ( + ) = +  

( - ) ( + ) = -    

( + ) ( - ) = -

A) ( + 11 ) · ( + 3 ) = +33

B) ( - 4 ) · ( - 6 ) = +24

C) ( + 9 ) · ( - 7 ) = -63

D) ( - 16 ) · ( - 6 ) = +96

E) ( - 20 ) · ( + 15 )​ = -300

Answer 2

Resposta:

(+11).(+3) = +33

(-4).(-6) = +24

(+9).(-7) = -63

(-16).(-6) = +96

(-20).(+15) = -300