Answer 1

\(75\%-1\dfrac{1}{2}+0,5:\dfrac{5}{12}-\left(\dfrac{-1}{2}\right)^2\\ =\dfrac{3}{4}-\dfrac{3}{2}+\dfrac{1}{2}.\dfrac{12}{5}-\dfrac{1}{4}\\ =\dfrac{3}{4}-\dfrac{6}{4}-\dfrac{1}{4}+\dfrac{6}{5}\\ =\dfrac{-4}{4}+\dfrac{6}{5}\\ =-1+\dfrac{6}{5}\\ =\dfrac{-5}{5}+\dfrac{6}{5}\\ =\dfrac{1}{5}\)

Answer 2

\(75\%-1\dfrac{1}{2}+0,5:\dfrac{5}{12}-\left(\dfrac{-1}{2}\right)^2\\ =\dfrac{3}{4}-\dfrac{3}{2}+\dfrac{1}{2}\cdot\dfrac{12}{5}-\dfrac{1}{4}\\ =\dfrac{3}{4}-\dfrac{3}{2}+\dfrac{6}{5}-\dfrac{1}{4}\\ =\dfrac{1}{2}-\dfrac{3}{2}+\dfrac{6}{5}\\ =-1+\dfrac{6}{5}\\ =\dfrac{-5}{5}+\dfrac{6}{5}\\ =\dfrac{1}{5}\)

Answer 3

`= 3/4 - 3/2 + 1/2 : 5/12 - (1/2)^2`

`= 3/4 - 6/4 + 6/5 - 1/4`

`= -1 + 6/5`

`= 1/5`.

Answer 4

ụa đề đôu??