Question

Calculeaza [1-(-2/3)×(-3/8)]÷(-1/2)​

Answer 1

Răspuns:

Explicație pas cu pas:

[ 1 - ( - 2/3 ) × ( - 3/8 ) ] : ( - 1/2) = - 3/2

= [ 1 - ( 2/8) ×(3/3)] : ( - 1/2) =

= ( 1 - 1/4) : ( - 1/2) =

= ( 4/4 - 1/4) : ( - 1/2) =

= (3/4) × ( - 2/1) =

= - 3 × (2/4) =

= - 3 × 1/2 =

= - 3/2

Answer 2

$\left[1-\left(-\dfrac{2}{3}\right)\times\left(-\dfrac{3}{8}\right)\right]\div\left(-\dfrac{1}{2}\right) = \\ \\ = \left(1-\dfrac{2\times 3 }{3\times 8}\right)\div\left(-\dfrac{1}{2}\right)\\ \\ =\left(1-\dfrac{1}{4}\right)\div\left(-\dfrac{1}{2}\right)\\ \\ = \dfrac{4-1}{4}\div\left(-\dfrac{1}{2}\right)\\ \\ = \dfrac{3}{4}\div\left(-\dfrac{1}{2}\right)\\ \\=\dfrac{3}{4}\cdot (-2) \\ \\= \boxed{-\dfrac{3}{2}}$