3 3/2+(5 3/2 - 2 1/4) =

= 16,5 + ( 26,5 - 4,25 )
= 16,5 + (22,25)
= 16,5 + 22,25
= 38,75

[tex]3 \frac{3}{2} + (5 \frac{3}{2} - 2 \frac{1}{4} ) = \frac{9}{2} + ( \frac{13}{2} - \frac{9}{4} )[/tex]
[tex] \frac{9}{2} + ( \frac{26}{4} - \frac{9}{4} )[/tex]
[tex] \frac{9}{2} + (\frac{14}{4} ) \: = \frac{18}{4} + \frac{14}{4} = \frac{32}{4} = 8[/tex]