Question

20 – Encontre os quocientes a seguir. a) ( - 4 / 5 ) : (8 / 5) = b) ( - 1,44) : ( - 0,24) = c) ( - 30,4) : 4 = d) 2 : ( - 0,5) e) ( - 2,1) : ( - 2,8) = g) 7,31 : ( - 1,7 ) =

Answer 1

Explicação passo-a-passo:

a)

$\sf \left(-\dfrac{4}{5}\right)\div\left(\dfrac{8}{5}\right)=-\dfrac{4}{5}\cdot\dfrac{5}{8}=-\dfrac{20}{40}=-\dfrac{1}{2}=-0,5$

b)

$\sf (-1,44)\div(-0,24)=(-144)\div(-24)=+6$

c)

$\sf (-30,4)\div4=(-304)\div40=-7,6$

d)

$\sf 2\div(-0,5)=20\div(-5)=-4$

e)

$\sf (-2,1)\div(-2,8)=(-21)\div(-28)=(-3)\div(-4)=+0,75$

g)

$\sf 7,31\div(-1,7)=731\div(-170)=-4,3$