[tex]2\frac{1}{2}\cdot(4 - 2\frac{1}{4}:2) = \frac{5}{2}\cdot(4-\frac{9}{4}:2) = \frac{5}{2}\cdot(4-\frac{9}{4}\cdot\frac{1}{2}) = \frac{5}{2}\cdot(\frac{32}{8}-\frac{9}{8}) = \frac{5}{2}\cdot\frac{23}{8}=\frac{115}{16} =7\frac{3}{16}[/tex]
