Question

8. Calcule
a) (+ 200) : (-4)

b) (-100):( - 100)

c) (+40) : (+20)

d) (+20) : (-5)

e) (-30):(+6)

f) (-35):(-7)

g) (+45):(+9)

h) (-60): (+30)​

Answer 1

→ Cálculo :

Regra de sinal :        

( - ) ( - ) = +  

( + ) ( + ) = +  

( - ) ( + ) = -  

( + ) ( - ) = -

A) ( + 200 ) ÷ ( - 4 ) = -50

B) ( - 100 ) ÷ ( - 100 ) = +1

C) ( + 40 ) ÷ ( + 20 ) = +2

D) ( + 20 ) ÷ ( - 5 ) = -4

E) ( - 30 ) ÷ ( + 6 ) = -5

F) ( - 35 ) ÷ ( - 7 ) = +5

G) ( + 45 ) ÷ ( + 9 ) = +5

H) ( - 60 ) ÷ ( + 30 )​ = -2