Question

Questão 27

Calcule mentalmente os quocientes.

a) (– 72) ÷ (– 8)= e) (–15) ÷ (+5) =

b) (–105) ÷ (+ 7) = f) (+ 32) ÷ (+4) =

c) (+ 240) ÷ (+20) = g) (– 20) ÷ (– 20) =

d) (+ 96) ÷ (– 6) = h) (+ 18) ÷ (– 2) =​

Answer 1

→ Cálculo :

Regra de sinal :        

( - ) ( - ) = +  

( + ) ( + ) = +  

( - ) ( + ) = -  

( + ) ( - ) = -

A) ( - 72 ) ÷ ( - 8 ) = +9      

B) ( - 105 ) ÷ ( + 7 ) = -15    

C) ( + 240 ) ÷ ( + 20 ) = +12    

D) ( + 96) ÷ ( - 6 ) = -16

E) ( - 15 ) ÷ ( + 5 ) = -3

F) ( + 32 ) ÷ ( + 4 ) = +8

G) ( - 20 ) ÷ ( - 20 ) = +1

H) ( + 18 ) ÷ ( - 2 ) = -9