b) \(\left[\left(\dfrac{1}{4}-0,5\right)\cdot2+\dfrac{8}{3}\right]:2\)
\(=\left[\left(\dfrac{1}{4}-\dfrac{1}{2}\right)\cdot2+\dfrac{8}{3}\right]:2\)
\(=\left[\left(\dfrac{1}{4}-\dfrac{2}{4}\right)\cdot2+\dfrac{8}{3}\right]:2\)
\(=\left(-\dfrac{1}{4}\cdot2+\dfrac{8}{3}\right):2\)
\(=\left(-\dfrac{1}{2}+\dfrac{8}{3}\right):2\)
\(=\dfrac{13}{6}:2\)
\(=\dfrac{13}{12}\)
d) \(\left(-0,75\right)-\left[\left(-2\right)+\dfrac{3}{2}\right]:1,5+\left(-\dfrac{5}{4}\right)\)
\(=\left(-0,75\right)-\left[\left(-2\right)+1,5\right]:1,5+\left(-\dfrac{5}{4}\right)\)
\(=\left(-0,75\right)-\left(-0,5\right):1,5+\left(-1,25\right)\)
\(=\left(-0,75\right)-\left(-\dfrac{1}{3}\right)-1,25\)
\(=-2+\dfrac{1}{3}\)
\(=-\dfrac{5}{3}\)